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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

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

Bigbear.ai Salaries by Position

Overview BigBear.ai is seeking a Business Analyst to for a multi-year contract to support the ongoing modernization and maintenance systems. What you will do The Business Analyst analyzes users requirements and high level system architectures to develop system requirements specifications Analyzes system requirements and leads design and development activities Guides users in formulating requirements, advises alternative approaches, and conducts feasibility studies Provides technical leadership for the integration of requirements, design, and technology Incorporates new plans, designs and systems into ongoing operations Develops technical documentation Develops system Architecture and system design documentation Guides system development and implementation planning through assessment or preparation of system engineering management plans and system integration and test plans Interacts with the Government regarding Systems Engineering technical considerations and for associated problems, issues or conflicts Ultimate responsibility for the technical integrity of work performed and deliverables associated with the Systems Engineering area of responsibility Work with a team of development and support engineers to support their successful achievement of their daily, iteration, release goals, and delivery objectives Facilitate daily scrums, sprint reviews, sprint planning, backlog grooming, etc. Ensure that the team is fully functional and productive, enabling close cooperation across all roles and functions, while removing barriers What you need to have Bachelor's Degree and 5 to 8 years of experience 4+ years of working knowledge of software development 4+ years of working knowledge of SQL Strong Agile Application Lifecycle Management (ALM) experience Excellent interpersonal skills including organizational, team building, people management, issue resolution, and customer relationship management Outstanding written and verbal communication skills at all levels of the organization with both internal and external customers Exceptional analytical and problem solving skills with proven ability to lead and manage projects with medium to high levels of technical and/or functional complexity Demonstrated ability to systematically gather relevant information from different sources to address an issue and make a prompt and insightful decision What we'd like you to have Programing experience Previous work with Government clients, DHS Past experience working with systems built using Java/JEE About BigBear.ai BigBear.ai is a leading provider of AI-powered decision intelligence solutions for national security, supply chain management, and digital identity. Customers and partners rely on BigBear.ais predictive analytics capabilities in highly complex, distributed, mission-based operating environments. Headquartered in Columbia, Maryland, BigBear.ai is a public company traded on the NYSE under the symbol BBAI. For more information, visit https://bigbear.ai/ and follow BigBear.ai on LinkedIn: @BigBear.ai and X: @BigBearai.

Overview: BigBear.ai is seeking a Data Engineer to join our team and help us build and maintain scalable and reliable data pipelines for our clients. You will be responsible for developing and designing data pipelines to support an end-to-end solution, integrating data pipelines with AWS cloud services to extract meaningful insights, and providing Tier 3 technical support for deployed applications and dataflows. What you will do: <ul><li>Develop and design data pipelines to support an end-to-end solution</li><li>Develop and maintain artifacts i.e., schemas, data dictionaries, and transforms related to ETL processes</li><li>Integrate data pipelines with AWS cloud services to extract meaningful insights</li><li>Manage production data within multiple datasets ensuring fault tolerance and redundancy</li><li>Design and develop robust and functional dataflows to support raw data and expected data</li><li>Provide Tier 3 technical support for deployed applications and dataflows</li><li>Collaborate with the rest of data engineering team to design and launch new features. Includes coordination and documentation of dataflows, capabilities, etc.</li></ul> What you need to have: Must maintain an active Top Secret with SCI eligibility clearance and be able to work in a fast-paced and collaborative environment. You will also need to have a Bachelors Degree and 2+ years of experience; or 8 to 10 years of relevant experience with no degree.<ul><li style="color: black;">Proficiency in data engineering, ETL architecture and development, and end-to-end processes</li><li style="color: black;">Experience in working with AWS cloud services, such as S3, EC2, Lambda, Glue, Athena, etc.</li><li style="color: black;">Experience in database administration and API development</li><li style="color: black;">Knowledge of data pipeline tools and frameworks, such as Airflow, Spark, Kafka, etc.</li><li style="color: black;">Ability to design and develop robust and functional dataflows to support raw data and expected data</li><li style="color: black;">Ability to develop and maintain artifacts, such as schemas, data dictionaries, and transforms related to ETL processes</li><li style="color: black;">Ability to collaborate with the rest of data engineering team to design and launch new features, including coordination and documentation of dataflows, capabilities, etc.</li><li style="color: black;">Ability to troubleshoot and resolve complex technical issues</li></ul> What we'd like you to have: <ul><li style="color: black;">Experience with cloud message APIs and usage of push notifications will be a plus for consideration</li><li style="color: black;">Keen interest in learning and using the latest software tools, methods, and technologies to solve real world problem sets vital to national security</li></ul> About BigBear.ai: BigBear.ai delivers AI-powered analytics and cyber engineering solutions to support mission-critical operations and decision-making in complex, real-world environments. BigBear.ais customers, which include the US Intelligence Community, Department of Defense, the US Federal Government, as well as customers in manufacturing, healthcare, commercial space, and other sectors, rely on BigBear.ais solutions to see and shape their world through reliable, predictive insights and goal-oriented advice. Headquartered in Columbia, Maryland, BigBear.ai is a global, public company traded on the NYSE under the symbol BBAI. For more information, please visit: <a href="https://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2Fbigbear.ai%2F&esheet=52762639&newsitemid=20220627005176&lan=en-US&anchor=http%3A%2F%2Fbigbear.ai%2F&index=6&md5=46c808e03ef531118eb1b10c105e2e97" target="_blank" rel="noopener">http://bigbear.ai/</a> and follow BigBear.ai on Twitter: <a href="https://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2Ftwitter.com%2Fbigbearai&esheet=52762639&newsitemid=20220627005176&lan=en-US&anchor=%40BigBearai&index=7&md5=650500ec8945043fc27d6f5e123e5959" target="_blank" rel="noopener">@BigBearai</a>.

Overview: BigBear.ai is seeking a Data Scientist. This contract provides operations research, modeling and simulation services to our customer and are responsible for the development and application of quantitative analytical methods, including models and simulations, to support Agency operations. The major driver in the establishment of the organization was to facilitate the integration of formal quantitative techniques into NSA/CSS processes. Knowledge and skills from the areas of: information research; systems analysis; decision analysis; operations research applications; software evaluation; software development, all phases - requirements definition, design, implementation, test and evaluation, installation, training, and documentation; modeling and simulation (M&S); Verification, Validation and Accreditation (VV&A); and the application of models to accomplish special studies and analysis projects What you will do: <ul><li>Develop machine learning, data mining, statistical and graphbased algorithms to analyze and make sense of dataset</li><li>Prototype or consider several algorithms and decide upon final model based on suitable performance metrics</li><li>Build models or develop experiments to generate data when training or example datasets are unavailable</li><li>Generate reports and visualizations that summarize datasets and provide data-driven insights to customers</li><li>Partner with subject matter experts to translate manual data analysis into automated analytics</li><li>Implement prototype algorithms within production frameworks for integration into analyst workflows</li></ul> What you need to have: <ul><li>Bachelor's Degree in a quantitative discipline (e.g., statistics, mathematics, operations research, engineering or computer science) and 17+ years of experience; or<ul><li>Master's Degree from an accredited college or university in STEM discipline and 15+ years experience in conducting modeling and simulation or decision analysis; or</li><li>Doctorate degree from an accredited college or university in Applied Science or related discipline and 10+ years experience in conducting modeling and simulation</li><li>(in lieu of Bachelors degree, 6 additional years of relevant experience)</li></ul></li><li>Clearance: TS/SCI w FSP (Full Scope Poly)</li><li>10 years of experience analyzing datasets and developing analytics.</li><li>10years of experience programming with data analysis software such as R, Python, SAS, or MATLAB.</li></ul> What we'd like you to have: <ul><li>A thirst for knowledge and a desire to dive deep into theory and execution</li></ul> About BigBear.ai: BigBear.ai is a leading provider of AI-powered decision intelligence solutions for national security, supply chain management, and digital identity. Customers and partners rely on BigBear.ais predictive analytics capabilities in highly complex, distributed, mission-based operating environments. Headquartered in Columbia, Maryland, BigBear.ai is a public company traded on the NYSE under the symbol BBAI. For more information, visit https://bigbear.ai/ and follow BigBear.ai on LinkedIn: @BigBear.ai and X: @BigBearai.

Overview BigBear.ai is seeking a Software Engineer to join the software development team who will develop and sustain integrated, feature-rich capabilities that promote modernization of visualization and presentation tools. The software development team will provide application development and support to tools that allow mission analytic users to view existing data or contribute new information in a collaborative environment. What you will do Analyze user requirements to derive software design and performance requirements Debug existing software and correct defects Provide recommendations for improving documentation and software development process standards Design and code new software or modify existing software to add new features Integrate existing software into new or modified systems or operating environments Develop simple data queries for existing or proposed databases or data repositories Write or review software and system documentation Serve as team lead at the level appropriate to the software development process being used on any particular project Design or implement complex database or data repository interfaces/queries Develop or implement algorithms to meet or exceed system performance and functional standards Assist with developing and executing test procedures for software components Develop software solutions by analyzing system performance standards, confer with users or system engineers; analyze systems flow, data usage and work processes; and investigate problem areas Modify existing software to correct errors, to adapt to new hardware, or to improve its performance What you need to have Bachelors degree in Computer Science or related discipline from an accredited college or university is required. Four (4) years of additional SWE experience on projects with similar software processes may be substituted for a bachelors degree. Seven (7) years experience as a SWE, in programs and contracts of similar scope, type and complexity is required. Clearance: TS/SCI with Poly Languages: Java, Python Testing: Unit, Integration Source Code Control (specifically Git) IDE (Intellij or Eclipse) Maven Frameworks: Spring Boot, Flask Analytical development: Machine Learning, Stream, Batch Virtualization Environments: Kubernetes, Containers (Docker, Containerd), Cloud (AWS/HCI) Streaming Frameworks: Kafka, Flink MongoDB, ArangoDB, Redis, PostgreSQL What we'd like you to have ElasticSearch About BigBear.ai BigBear.ai is a leading provider of AI-powered decision intelligence solutions for national security, supply chain management, and digital identity. Customers and partners rely on BigBear.ais predictive analytics capabilities in highly complex, distributed, mission-based operating environments. Headquartered in Columbia, Maryland, BigBear.ai is a public company traded on the NYSE under the symbol BBAI. For more information, visit https://bigbear.ai/ and follow BigBear.ai on LinkedIn: @BigBear.ai and X: @BigBearai.

Bigbear.ai Interview Questions

Bigbear.ai Interview Guides

Bigbear.ai Interview Questions

Bigbear.ai Salaries by Position

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