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Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

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

Idaho national laboratory Salaries by Position

Idaho National Laboratory is hiring a Data Scientist to work in our AI Data and Visualization department. Our team works a 9x80 schedule located out of our Idaho Falls facility with every other Friday off. Hybrid work opportunities may be available for this position. In our Data Scientist role, you will apply data science, data engineering, computer programming, and AIML models to address challenges related to nuclear energy and energy security. Responsibilities Include: <ul><li>Perform research and development to conceptualize and employ novel solutions that advance state-of-the-art energy security, nuclear materials, and fuels.</li><li>Work with teams in multiple disciplines including 3D visualization, cybersecurity, materials science, high performance computing, physics, engineering, and more.</li><li>Analyze data and generate results in response to data analytics, visualization, and modeling needs on a variety of computational architectures (cloud, on-premises, edge-based).</li><li>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/or data sensor fusion methodologies.</li><li>Work with domain experts to understand the scope and limits of questions that can be answered by data sets, identify key data features as inputs to analysis, and design output metrics that elegantly describe system attributes and behavior.</li><li>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 applying capabilities to impactful issues in risk, reliability, and operational performance.</li><li>You will report to the Department Manager.</li></ul> Minimum Requirements: <ul><li>BS in computer science, engineering field or related degree</li><li>You are required to show a demonstrated commitment to valuing diversity and contributing to an inclusive working environment.</li><li>This position requires the ability to obtain and maintain a Department of Energy "Q" clearance, which requires US Citizenship.</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></ul> Job Information: <ul><li>The pay range for this position is $63,528.00 min - $130,284.00 max. 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></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.

Idaho National Laboratory is hiring a Critical Infrastructure/Cyber Data Analyst to work in our Infrastructure Resilience & Analysis Department. Our team works a 9x80 schedule located out of our Idaho Falls facility with every other Friday off. You will report to the Department Manager. Provide onsite technical expertise in critical infrastructure security and coordinate interaction and information sharing with various partners within the U.S. government, State government, Local government, private/public industries, academia, and research related to critical infrastructure security issues and events associated with all 16 critical infrastructure sectors. Responsibilities Include: Provide advice and expertise in cybersecurity designs, implementation, vulnerability identification, and mitigation techniques and procedures that will aid industry and the Nation in securing critical infrastructure systems against current and latest threats. Respond to crises or urgent situations within critical infrastructure sectors to avoid immediate and potential threats. Develop, research, and apply advanced mitigation, preparedness, and response and recovery approaches to maximize survival of life, preservation of property, and information security. Promote an environment with all partners at all levels to develop mutual trust and teamwork. Conduct iformatin collection and analysis of United States critical infrastructure. Manage teams in the creation of cyber security products. Create related reports and provide briefings related to these issues. Conduct technical analysis projects. Work to fill gaps in current situational awareness across sectors and develop products to address the needs of a diverse customer set spanning multiple classification levels, federal, private, and international organizations. Contribute to scientific and technical products such as patents, software, journal papers, reports, proceedings, and policies. May contribute to the development of intellectual property leading to patents, publications, and copyrights. Interface with ICS and critical infrastructure protection community to meet program requirements. Work with customers to meet project requirements including defining scope, schedule, and budget estimates, delivering the project milestones on time and on budget, future research ideas and proposals and general customer satisfaction requirements. Advance strategic objectives to generate and sustain a unique critical infrastructure analysis and regional resilience capability for the division. Other tasks as assigned. Minimum Requirements: Bachelor of Science degree in mechanical or electrical engineering, cyber security/computer sciences, or business/financial management from an accredited institution. EX3 - You must have a BS and 5 years, MS and 2 years, Ph. D and 2 years of experience EX4 - You must have a BS and 9 years, MS and 6 years, Ph. D and 4 years of experience. Relevant experience determined by level experience shall include designing or applying control systems cyber security solutions in critical infrastructure at the system regional level. You will be asked to maintain a Department of Energy Q and TS/SCI level security clearance. Must be a US Citizen Test Designated Position (TDP) Special Requirements You can address multiple complex tasks to meet commitments while maintaining quality of work and a professional interface. Ideal Candidate will have the below: •Professional Engineer or Certified Information Systems Security Professional (CISSP) certifications. •Relevant experience to include program management here at INL, particularly in the cyber security realm, and familiarity with industrial control systems. In-depth knowledge of the US energy sector and experience working with DOE, DOD and DHS and private industry on grid security-related projects is beneficial. Job Information: <ul><li>The pay range for this position is: Level 3 ($91,008 - $186,588) / Level 4 ($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><li>TDP: This is a testing designated position; you will 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.</li></ul><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.

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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