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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

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

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?

Ascential Salaries by Position

Job Specifications: Ideal candidate will possess 2+ years designing real-time/multitasking software in C/C++/C# with exposure to equipment integration, validation, and in field installations.Motivated individual who understands the importance of being a team player to achieve organizational goals and thrives in a fast paced, multicultural work environment.Willing and able to travel as needed. Required Skills: <ul><li>BSCE, BSCS, or engineering degree with equivalent programming experience </li><li>Object oriented development experience </li><li>Proficiency in C/C++/C# </li><li>Software and Hardware integration </li></ul>Preferred Skills:<ul><li>Experience with Unix environments specifically QNX </li><li>Familiarity with communications standards RS-232/422/485, TCP/UDP, CAN/CANFD </li><li>Experience with version control software such as git or SVN </li><li>Strong background in math </li><li>Working knowledge of Control Systems Design and Frequency Analysis </li><li>Familiarity with EE and ME concepts regarding Drives and Motors </li></ul>Responsibilities:<ul><li>Developing real-time/multithread control software in C/C++/C# </li><li>Troubleshooting systems comprised of multiple software and hardware components </li><li>Communicating with stake holders to refine requirements and resolve functionality </li><li>Supporting new and existing equipment remotely or onsite </li><li>Travel as needed up to 15% </li> </ul>

Ascential Interview Questions

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Ascential Interview Questions

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