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Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

In an A/B test, how can you check if assignment to the various buckets was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

Idaho national laboratory Salaries by Position

Idaho National Laboratory is hiring a Data Scientist to work in our Digital Twin Frameworks department. Our team works a 9x80 schedule located out of our Research Education Campus with every other Friday off. You will apply mathematics, statistics, logic, and computer science to find insights and conclusions from large datasets. Develop and test algorithms and software-based analytical tools to operationalize those algorithms, using artificial intelligence, machine-learning, and other techniques. Adapt machine learning and artificial intelligence technologies to solve scientific problems and to extract new insights from scientific data. Work with a diverse team of scientists and engineers. Responsibilities Include: Analyze data and create results in response to data analytics, visualization, and modeling needs on a variety of computational architectures (cloud, on-premises, edge-based). Apply advanced technologies, such as Explainable Artificial Intelligence/Machine Learning (AI/ML), Large language models (LLMs), physics-informed machine learning process-informed Machine Learning, systems performance analysis, and data sensor fusion methodologies. Work with a diverse team of scientists and engineers on challenging work scope. Demonstrate effective research skills and the ability to collaborate and partner with other government agencies, academia, and private sector companies to achieve project goals. Publish results of research and development in a mix of refereed publications and conference proceedings. Work with other research teams to develop cross-cutting technical programs for a variety of customers. Maintain notebooks, software, and applications. Work with software and database developers to develop, test, and deploy software code to development, staging and production environments. May develop software for custom solutions, including 3D visualization tools, paralleled software, batch scripting and web API interaction/development. Analyze data quality, characterize, and communicate data quality issues to data providers, and design repeatable data processing procedures to accurately analyze data in the presence of quality issues. Work with domain experts to understand the scope and limits of questions that can be answered by data sets, identify main data features as inputs to analysis, and design output metrics that elegantly describe system attributes and behavior. Employ specialized methods and state-of-the-art data analysis and modeling tools to support the INL's mission by ensuring the nations safe,, and sustainable use of engineered systems in many domains by Apply capabilities to impactful issues in risk, reliability, and operational performance. Follow INL policies and lab-wide procedures related to software development, cybersecurity, and management of sensitive information. Work with data providers, database administrators, and software developers to diagnose and with data and software systems quickly and effectively.

Job Description - Embedded Software Engineer (22068)DescriptionIdaho National Laboratory is hiring an Embedded Software Engineer to work in our Spectrum Innovation department. Our team works a 9x80 schedule located out of our REC facility with every other Friday off.You will design, develop, code, test, and troubleshoot embedded system software. Design, develop, operate, and maintain embedded application software and/or firmware that will drive controls and control systems. Apply appropriate standards, processes, procedures, and tools throughout the system development life cycle to support the generation of such products as transportation systems, telecommunications, consumer electronics, security systems, and manufacturing systems. Develop and implement embedded devices and systems, and support software quality assurance while optimizing system performance. You will report to the manager for Spectrum Innovation.Responsibilities Include:<ul><li>Design and implement software for embedded devices and systems from requirements to production and commercial deployment. Design, develop, code, test, review, and debug system software.</li><li>Coordinate and participate in architecture, requirements, design, code, and test case reviews.</li><li>Develop new embedded architectures to support our growing product development plans.</li><li>Utilize knowledge of hardware schematics and write codes for related chip data sheets.</li><li>Design the first layer of code that runs on a device and possess full understanding of device hardware. Develop code for multiple layers of software from the physical layer up to the application layer.</li><li>Analyze and enhance efficiency, stability, and scalability of system resources. Optimize system performance.</li><li>Engage with internal and external organizations to develop new R&D capabilities and products. Interface with hardware design and development.</li><li>Conduct research, development, demonstration, and deployment for applicable technologies.</li><li>Ensure work is performed in a safe, secure, cost-effective, and compliant manner, consistent with the INL mission, vision, values, policies, and procedures and within defined cost, scope, and schedule.</li><li>Integrate and validate new product designs.</li><li>Support software QA and participate in coding/design/peer reviews.</li><li>Provide post-production support.</li><li>Assess third party and open-source software.</li></ul>Qualifications<ul><li>Level 1: Bachelor of Science in Computer Engineering, Electrical Engineering or Computer Science or directly related field.</li><li>Level 2: Bachelor of Science in Computer Engineering, Electrical Engineering or Computer Science or directly related field and 2 years relevant experience.</li><li>Proficiency in C, C++, Python or similar languages.</li><li>This position requires the ability to obtain and maintain a Department of Energy "L" clearance, which requires US Citizenship.</li></ul>Ideal Candidate will have:<ul><li>Experience with system integration activities.</li><li>Proficiency with RTOS, computer architecture, multi-threaded programming.</li></ul>Job Information:<ul><li>The pay range for this position is: Level 1 ($63,528 - $130,284) / Level 2 ($75,804 - $155,496). At Idaho National Laboratory compensation decisions are determined using factors such as education, relevant experience, and other credentials.</li><li>You are required to show a demonstrated commitment to valuing diversity and contributing to an inclusive working environment.</li><li>TDP: This is a testing designated position; you will be required to submit to a pre-employment drug screen and periodic drug testing throughout the term of your employment.</li><li>Multi-Level: This is a multi-level posting and you will be placed at the appropriate level dependent on depth and breadth of proven experience and skills.</li></ul>Benefits and Relocation<ul><li>Medical, Dental, Vision, and Flexible Spending Accounts</li><li>401(k) with a 4.2% employer contribution and up to 4.8% match</li><li>Paid time off (personal leave)</li><li>Employee Education Program (tuition assistance)</li><li>Benefit eligibility subject to multiple factors, including employment status and position classification.</li></ul>INL is a science-based, applied engineering national laboratory dedicated to supporting the U.S. Department of Energy’s mission in nuclear energy research, science, and national defense.INL Mission Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure.INL Vision Our vision is to change the world’s energy future and secure our nation’s critical infrastructure.Selective Service Requirements To be eligible for employment at INL males born after December 31, 1959 must have registered with the Selective Service System (SSS). For more information see www.sss.gov.Equal Employment Opportunity Idaho National Laboratory (INL) is an Equal Employment Opportunity (EEO) employer. It is the policy of INL to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information. Women and People of Color are strongly encouraged to apply.Reasonable Accommodation We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.Other Information When applying to positions please provide a resume and answer all questions on the following screens. Applicants, who fail to provide a resume or answer the questions, may be deemed ineligible for consideration.INL does not accept resumes from third party vendors unsolicited.<h3>Primary Location</h3>US-ID-Idaho Falls<h3>Job</h3>Computer Information Systems<h3>Organization</h3>National & Homeland Security (Dxxx)<h3>Schedule</h3>Full-time<h3>Employee Status</h3>Regular<h3>Job Posting</h3>Unposting DateTELEWORK: On-Site WorkerBattelle Energy Alliance manages INL for the U.S. Department of Energy’s Office of Nuclear EnergyIdaho National Laboratory 1955 N. Fremont Ave. Idaho Falls, ID 83415 866-495-7440
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Idaho National Laboratory is hiring a Data Scientist to work in our Digital Twin Frameworks department. Our team works a 9x80 schedule located out of our Research Education Campus with every other Friday off. You will apply mathematics, statistics, logic, and computer science to find insights and conclusions from large datasets. Develop and test algorithms and software-based analytical tools to operationalize those algorithms, using artificial intelligence, machine-learning, and other techniques. Adapt machine learning and artificial intelligence technologies to solve scientific problems and to extract new insights from scientific data. Work with a diverse team of scientists and engineers. Responsibilities Include: Analyze data and create results in response to data analytics, visualization, and modeling needs on a variety of computational architectures (cloud, on-premises, edge-based). Apply advanced technologies, such as Explainable Artificial Intelligence/Machine Learning (AI/ML), Large language models (LLMs), physics-informed machine learning process-informed Machine Learning, systems performance analysis, and data sensor fusion methodologies. Work with a diverse team of scientists and engineers on challenging work scope. Demonstrate effective research skills and the ability to collaborate and partner with other government agencies, academia, and private sector companies to achieve project goals. Publish results of research and development in a mix of refereed publications and conference proceedings. Work with other research teams to develop cross-cutting technical programs for a variety of customers. Maintain notebooks, software, and applications. Work with software and database developers to develop, test, and deploy software code to development, staging and production environments. May develop software for custom solutions, including 3D visualization tools, paralleled software, batch scripting and web API interaction/development. Analyze data quality, characterize, and communicate data quality issues to data providers, and design repeatable data processing procedures to accurately analyze data in the presence of quality issues. Work with domain experts to understand the scope and limits of questions that can be answered by data sets, identify main data features as inputs to analysis, and design output metrics that elegantly describe system attributes and behavior. Employ specialized methods and state-of-the-art data analysis and modeling tools to support the INL's mission by ensuring the nations safe,, and sustainable use of engineered systems in many domains by Apply capabilities to impactful issues in risk, reliability, and operational performance. Follow INL policies and lab-wide procedures related to software development, cybersecurity, and management of sensitive information. Work with data providers, database administrators, and software developers to diagnose and with data and software systems quickly and effectively.

Job Description - Senior Power Systems Research Engineer (22203)DescriptionIdaho National Laboratory is hiring a Senior Power Systems Research Engineer to work in our Power and Energy Systems Department within the Energy and Environment Science & Technology (EES&T) Directorate at Idaho National Laboratory. Our team works a 9x80 schedule located out of our Energy Systems Laboratory in Idaho Falls with every other Friday off. Hybrid work opportunities may be available for this position.You will report to the Manager of Power and Energy Systems department and you will contribute to research projects, enhance technical capability of the group, and interface with internal and external partners. You will also contribute to the team’s culture, which is characterized by strong trust, mutual respect, and support.Responsibilities Include:<ul><li>Select, apply, and integrate engineering principles, theories, concepts, and technologies with complex engineered systems.</li><li>Alone or in collaboration with others, design, plan, coordinate, implement, and disseminate projects in the form of technical reports, publications, and presentations at national technical meetings and project reviews with program sponsors.</li><li>Determine or approve the technical approach for the development and testing of engineered solutions using existing or newly created technologies.</li><li>Produce proposals and perform business development for new work including joint projects with industry. Develop physics-based mathematical models of mechanical, chemical, and electrical systems to support and verify design.</li><li>Collaborate and partner with other government agencies, academia, and private sector companies to achieve project goals.</li><li>Enhance technical skills and other capabilities to support the INL mission. Stay up to date with developments in industry and maintain skills and contribute to the development of new concepts.</li><li>Develop design documentation, maintenance and configuration of power systems, and research and development of advanced power control or measurement techniques.</li><li>Apply engineering principles to the development of operational power systems and may include the development of software and hardware.</li><li>Research and development activities, developing power system dynamic and transient modeling and simulations, including machine learning applications that advance power system protection.</li><li>Test and validate developed power system theories and algorithms using digital real-time simulation environments including hardware-in-the-loop.</li><li>Mentor junior staff and look for opportunities to involve them in current projects.</li></ul>Qualifications:<ul><li>Master’s degree and 6 years of experience or a PhD and 4 years of experience. Relevant degrees include: Electrical Engineering, Power Systems Engineering, or related field.</li><li>Established publication or a patent record in power systems dynamic and transient modeling and simulation, power systems applications, protection, and stability analysis.</li><li>Proposal writing and research project execution experience.</li></ul>Job Information:<ul><li>The pay range for this position is $109,260 - $223,908. At Idaho National Laboratory, compensation decisions are determined using factors such as education, relevant experience, and other credentials.</li><li>You are required to show a demonstrated commitment to valuing diversity and contributing to an inclusive working environment.</li></ul>Benefits and Relocation:<ul><li>Medical, Dental, Vision, and Flexible Spending Accounts</li><li>401(k) with a 4.2% employer contribution and up to 4.8% match</li><li>Paid time off (personal leave)</li><li>Employee Education Program (tuition assistance)</li><li>Benefit eligibility subject to multiple factors, including employment status and position classification.</li></ul>INL Mission: Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure.INL Vision: Our vision is to change the world’s energy future and secure our nation’s critical infrastructure.Selective Service Requirements: To be eligible for employment at INL, males born after December 31, 1959 must have registered with the Selective Service System (SSS). For more information see www.sss.gov.Equal Employment Opportunity: Idaho National Laboratory (INL) is an Equal Employment Opportunity (EEO) employer. It is the policy of INL to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information. Women and People of Color are strongly encouraged to apply.Reasonable Accommodation: We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.Other Information: When applying to positions please provide a resume and answer all questions on the following screens. Applicants who fail to provide a resume or answer the questions may be deemed ineligible for consideration.INL does not accept resumes from third party vendors unsolicited.<h3>Primary Location</h3>US-ID-Idaho Falls<h3>Job</h3><h3>Organization</h3>Energy & Environment Science & Technology (Bxxx)<h3>Schedule</h3>Full-time<h3>Employee Status</h3>Regular<h3>Job Posting</h3><h3>Unposting Date</h3>TELEWORK: Hybrid WorkerIdaho National Laboratory 1955 N. Fremont Ave. Idaho Falls, ID 83415 866-495-7440
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Idaho National Laboratory is hiring a Senior Power Systems Research Engineer to work in our Power and Energy Systems Department within the Energy and Environment Science & Technology (EES&T) Directorate at Idaho National Laboratory. Our team works a 9x80 schedule located out of our Energy Systems Laboratory in Idaho Falls with every other Friday off. Hybrid work opportunities may be available for this position. You will report to the Manager of Power and Energy Systems department and you will contribute to research projects, enhance technical capability of the group, and interface with internal and external partners. You will also contribute to the team's culture, which is characterized by strong trust, mutual respect, and support. Responsibilities Include: <ul><li>Select, apply, and integrate engineering principles, theories, concepts, and technologies with complex engineered systems.</li><li>Alone or in collaboration with others, design, plan, coordinate, implement, and disseminate projects in the form of technical reports, publications, and presentations at national technical meetings and project reviews with program sponsors.</li><li>Determine or approve the technical approach for the development and testing of engineered solutions using existing or newly created technologies.</li><li>Produce proposals and perform business development for new work including joint projects with industry. Develop physics-based mathematical models of mechanical, chemical, and electrical systems to support and verify design.</li><li>Collaborate and partner with other government agencies, academia, and private sector companies to achieve project goals.</li><li>Enhance technical skills and other capabilities to support the INL mission. Stay up to date with developments in industry and maintain skills and contribute to the development of new concepts.</li><li>Develop design documentation, maintenance and configuration of power systems, and research and development of advanced power control or measurement techniques. </li><li>Apply engineering principles to the development of operational power systems and may include the development of software and hardware. </li><li>Research and development activities, developing power system dynamic and transient modeling and simulations, including machine learning applications that advance power system protection.</li><li>Test and validate developed power system theories and algorithms using digital real-time simulation environments including hardware-in-the-loop.</li><li>Mentor junior staff and look for opportunities to involve them in current projects. </li></ul> Minimum Requirements: <ul><li>Master's degree and 6 years of experience or a PhD and 4 years of experience. Relevant degrees include: Electrical Engineering, Power Systems Engineering, or related field.</li><li>Established publication or a patent record in power systems dynamic and transient modeling and simulation, power systems applications, protection, and stability analysis.</li><li>Proposal writing and research project execution experience.</li></ul> Desired Experience: <ul><li>Project Management experience</li></ul> Job Information: <ul><li>The pay range for this position is $109,260 - $223,908 . At Idaho National Laboratory compensation decisions are determined using factors such as education, relevant experience, and other credentials.</li><li>You are required to show a demonstrated commitment to valuing diversity and contributing to an inclusive working environment.</li></ul> Benefits and Relocation <ul><li>Medical, Dental, Vision, and Flexible Spending Accounts</li><li>401(k) with a 4.2% employer contribution and up to 4.8% match</li><li>Paid time off (personal leave)</li><li>Employee Education Program (tuition assistance)</li><li>Comprehensive Relocation Package</li><li>Benefit eligibility subject multiple factors, including employment status and position classification.</li></ul> INL is a science-based, applied engineering national laboratory dedicated to supporting the U.S. Department of Energy's mission in nuclear energy research, science, and national defense. With more than 5,000 scientists, researchers, and support staff, the laboratory works with national and international governments, universities and industry partners to discover new science and development technologies that underpin the nation's nuclear and renewable energy, national security, and environmental missions. INL Mission Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure. INL Vision Our vision is to change the world's energy future and secure our nation's critical infrastructure. Selective Service Requirements To be eligible for employment at INL males born after December 31, 1959 must have registered with the Selective Service System (SSS). For more information see www.sss.gov. Equal Employment Opportunity Idaho National Laboratory (INL) is an Equal Employment Opportunity (EEO) employer. It is the policy of INL to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information. Women and People of Color are strongly encouraged to apply. Reasonable Accommodation We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation. Other Information When applying to positions please provide a resume and answer all questions on the following screens. Applicants, who fail to provide a resume or answer the questions, may be deemed ineligible for consideration. INL does not accept resumes from third party vendors unsolicited.

Include: Analyze data and create results in response to data analytics, visualization, and modeling needs on a variety of computational architectures (cloud, on-premises, edge-based). Apply advanced technologies, such as Explainable Artificial Intell Data Scientist, Scientist, Data Science, Software Developer, Database Administrator, Technology, Development

Idaho National Laboratory is hiring a Data Scientist to work in our Digital Twin Frameworks department. Our team works a 9x80 schedule located out of our Research Education Campus with every other Friday off.

You will apply mathematics, statistics, logic, and computer science to find insights and conclusions from large datasets. Develop and test algorithms and software-based analytical tools to operationalize those algorithms, using artificial intelligence, machine-learning, and other techniques. Adapt machine learning and artificial intelligence technologies to solve scientific problems and to extract new insights from scientific data. Work with a diverse team of scientists and engineers.

Responsibilities Include:

Analyze data and create results in response to data analytics, visualization, and modeling needs on a variety of computational architectures (cloud, on-premises, edge-based).

Apply advanced technologies, such as Explainable Artificial Intelligence/Machine Learning (AI/ML), Large language models (LLMs), physics-informed machine learning process-informed Machine Learning, systems performance analysis, and data sensor fusion methodologies.

Work with a diverse team of scientists and engineers on challenging work scope.

Demonstrate effective research skills and the ability to collaborate and partner with other government agencies,

academia, and private sector companies to achieve project goals.

Publish results of research and development in a mix of refereed publications and conference proceedings.

Work with other research teams to develop cross-cutting technical programs for a variety of customers.

Maintain notebooks, software, and applications.

Work with software and database developers to develop, test, and deploy software code to development, staging and production environments.

May develop software for custom solutions, including 3D visualization tools, paralleled software, batch scripting and web API interaction/development.

Analyze data quality, characterize, and communicate data quality issues to data providers, and design repeatable data processing procedures to accurately analyze data in the presence of quality issues.

Work with domain experts to understand the scope and limits of questions that can be answered by data sets, identify main data features as inputs to analysis, and design output metrics that elegantly describe system attributes and behavior.

Employ specialized methods and state-of-the-art data analysis and modeling tools to support the INL's mission by ensuring the nation’s safe,, and sustainable use of engineered systems in many domains by Apply capabilities to impactful issues in risk, reliability, and operational performance.

Follow INL policies and lab-wide procedures related to software development, cybersecurity, and management of sensitive information.

Work with data providers, database administrators, and software developers to diagnose and with data and software systems quickly and effectively.

Idaho national laboratory Interview Questions

Idaho national laboratory Interview Guides

Idaho national laboratory Interview Questions

Idaho national laboratory Salaries by Position

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