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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

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

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Our Client is looking for Data Scientists who are dedicated to data mining techniques for various applications serving enterprise and consumer end-users. Understanding of machine learning techniques including predictive modeling, text and image mining, clustering, deep learning, anomaly detection, forecasting methods and other advanced statistical techniques. You will work with data from diverse structured and unstructured data sources in both batch and streaming modes, and various formats including tabular, image/video, audio, text and time series etc Qualifications: PhD degree in Computer Science, Electrical Engineering, Statistics, Mathematics, Operations Research or similar technical field Knowledge of machine learning and data mining techniques in one or more areas of statistical modeling methods, time series, text mining, optimization, information retrieval Ability to prototype statistical analysis and modeling algorithms and apply these algorithms for data driven solutions to problems in new domains Telecom experience desired Distributed computing systems knowledge is a plus

Our Client is looking for Data Scientists who are dedicated to data mining techniques for various applications serving enterprise and consumer end-users. Understanding of machine learning techniques including predictive modeling, text and image mining, clustering, deep learning, anomaly detection, forecasting methods, and other advanced statistical techniques.You will work with data from diverse structured and unstructured data sources in both batch and streaming modes, and various formats including tabular, image/video, audio, text, and time series.<h3>Qualifications:</h3><ul><li>PhD degree in Computer Science, Electrical Engineering, Statistics, Mathematics, Operations Research, or similar technical field.</li><li>Knowledge of machine learning and data mining techniques in one or more areas of statistical modeling methods, time series, text mining, optimization, information retrieval.</li><li>Ability to prototype statistical analysis and modeling algorithms and apply these algorithms for data-driven solutions to problems in new domains.</li><li>Telecom experience desired.</li><li>Distributed computing systems knowledge is a plus.</li></ul>
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Title: Data Engineer Location: Chicago, Ill Openings: 1 Type: Permanent hire The Client is searching for an experienced data engineer. This person will be responsible for building and managing an array of data acquisition services. The ideal candidate will demonstrate experience with software development lifecycles, working with cloud architecture, and development within a software team.Responsibilities:<ol><li>Data mining, web scraping, cleaning, and organizing data into both SQL and NoSQL databases.</li><li>Building efficient APIs to communicate the data.</li><li>Managing continual data ingestion.</li></ol>Required Job Qualifications:<ol><li>At least 4 years experience with Python development and database management in a Linux environment.</li><li>Expertise in relational database architecture and efficient SQL. Experience with managing databases in Azure is a plus as well as Neo4j graph databases.</li><li>Development of RESTful APIs.</li><li>Distributed computing (Spark or similar).</li><li>Ability to provide guidance on data security issues.</li><li>Writing and maintaining clear and reproducible documentation for all services and projects.</li><li>Strong general communication and interpersonal skills.</li><li>Capable of providing guidance to junior developers.</li></ol>Preferred Job Qualifications:<ol><li>Experience in machine learning and general data science.</li><li>Data visualization.</li><li>Understanding of the healthcare industry.</li><li>Azure, Google, AWS or other cloud-platform experience.</li><li>SDLC Tools & Processes: JIRA, Docker, Git-flow, Puppet, or similar.</li></ol>Education Requirements:<ol><li>B.Sc. in Computer Science, Engineering, or related field.</li></ol>
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Type: Sr. Software Engineer (Java, Integration, Streaming) Location: Seattle, WA Openings: 1 Type: Long-term Contract Summary Do you have a passion for developing highly scalable, highly available software that provides key game features to millions of users? Are you eager to work in the fast growing, dynamic, and challenging mobile games space? The Platform Service Team is looking for a senior software engineer to join our team. We support a number of back-end services that drive game features and user experience. We solve complex problems and deliver highly customized solutions for our mobile business lines. If youre looking for an opportunity to develop highly performant, highly available, scalable systems that provide key features to millions of users across hundreds of different games, this is the team for you! Responsibilities <ul> <li>Build and maintain mission critical back-end services that handle high volume of traffic</li> <li>Research, design and prototype solutions to complex business problems</li> <li>Deliver high quality, extensible and maintainable software</li> <li>Collaborate with other engineering teams to ensure integrity of end-to-end functionality</li> <li>Work in partnership with the product team and other stakeholders to produce high quality and specific requirements.</li> </ul> Required Skills <ul> <li>5+ years Java experience </li> <li>2+ years Docker experience</li> <li>5+ years working with integrating ResT APIs</li> <li>CI/CD</li> <li>Solid understanding of web development and client-server technologies</li> <li>Excellent problem solving, debugging and troubleshooting skills</li> <li>Strong verbal and written communication skills</li> <li>Be self-motivated and results oriented</li> <li>Desire and ability to learn quickly and be part of a world-class team</li> <li>Experience with cloud storage solutions, cloud native solutions, Google App Engine, open source software communities, Cloud networking solutions, or distributed computing technology.</li> <li>5 years of progressive, post-baccalaureate experience as a Software Engineer or a related occupation</li> <li>5 years of experience working with object oriented programming language (Java or C#) and dependency management</li> <li>5 years of experience building highly scalable, highly available, distributed systems with service oriented architecture (RESTful, RPC)</li> <li>5 years of experience in data persistence technologies, both relational (SQL) and non-relational (Memcached, Redis, MongoDB)</li> <li>5 years of experience using source control management tools (SVN or Git)</li> </ul> Nice to Have <ul> <li>2+ years data streaming experience</li> <li>Experience with Service Oriented Architecture</li> <li>Experience with Cloud Native Architecture</li> <li>Experience with concurrency and distributed computing</li> <li>Experience with data encoding and compression techniques</li> <li>Experience using Agile/Scrum methodologies to iterate quickly on product changes</li> </ul>

Type: Sr. Software Engineer (PHP, Java) Location: Seattle, WA Openings: 1 Type: Long-term Contract Summary Do you have a passion for developing highly scalable, highly available software that provides key game features to millions of users? Are you eager to work in the fast growing, dynamic, and challenging mobile games space? The Platform Service Team is looking for a senior software engineer to join our team. We support a number of back-end services that drive game features and user experience. We solve complex problems and deliver highly customized solutions for our mobile business lines. If youre looking for an opportunity to develop highly performant, highly available, scalable systems that provide key features to millions of users across hundreds of different games, this is the team for you! Responsibilities <ul> <li>Build and maintain mission critical back-end services that handle high volume of traffic</li> <li>Research, design and prototype solutions to complex business problems</li> <li>Deliver high quality, extensible and maintainable software</li> <li>Collaborate with other engineering teams to ensure integrity of end-to-end functionality</li> <li>Work in partnership with the product team and other stakeholders to produce high quality and specific requirements.</li> </ul> Required Skills <ul> <li>3+ years Java experience</li> <li>5+ years PHP experience</li> <li>3+ years designing, developing, and deploying web applications in a scalable cloud-native way</li> <li>2+ years Docker experience</li> <li>CI/CD</li> <li>Solid understanding of web development and client-server technologies</li> <li>Excellent problem solving, debugging and troubleshooting skills</li> <li>Strong verbal and written communication skills</li> <li>Be self-motivated and results oriented</li> <li>Desire and ability to learn quickly and be part of a world-class team</li> <li>Experience with cloud storage solutions, cloud native solutions, Google App Engine, open source software communities, Cloud networking solutions, or distributed computing technology.</li> <li>5 years of progressive, post-baccalaureate experience as a Software Engineer or a related occupation</li> <li>5 years of experience working with object oriented programming language (Java or C#) and dependency management</li> <li>5 years of experience building highly scalable, highly available, distributed systems with service oriented architecture (RESTful, RPC)</li> <li>5 years of experience in data persistence technologies, both relational (SQL) and non-relational (Memcached, Redis, MongoDB)</li> <li>5 years of experience using source control management tools (SVN or Git)</li> </ul> Nice to Have <ul> <li>2+ years JavaScript development (React/Flux/Typescript)</li> <li>Experience with Service Oriented Architecture</li> <li>Experience with Cloud Native Architecture</li> <li>Experience with concurrency and distributed computing</li> <li>Experience with data encoding and compression techniques</li> <li>Experience using Agile/Scrum methodologies to iterate quickly on product changes</li> </ul>

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