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Signature Science, Llc Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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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?

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

A/B Testing & Experimentation

<h3>Job Description</h3><div>Job Description<div>Position Purpose: The primary purpose of this position is to develop and maintain software tools used for applied research projects in the Atlantic City Operation.Essential Duties and Responsibilities:<ul><li>Develops software using LabVIEW, Visual Basic for Applications (VBA), Python, and C#, to fulfill the needs of government-based projects.</li><li>Develops data collection tools used during test and evaluation events.</li><li>Develops software tools to build and query databases (e.g. Microsoft Access, SQL).</li><li>Updates software tools based on ISO 17025 needs.</li><li>Develops software programs to control custom hardware.</li><li>Identifies and suggests optimizations and features to improve hardware/software capabilities.</li><li>Maintains software tools as needed.</li><li>Composes and reviews technical manuals and reports.</li><li>Develops intuitive Graphical User Interfaces (GUIs).</li><li>Assesses impact of changes to applications and systems and makes recommendations.</li><li>Thoroughly documents computer code and software lifecycle developments.</li><li>Keeps current with latest software development tools and techniques.</li><li>Competent in using Windows and Linux/Unix operating system command line interface.</li><li>Other duties as assigned.</li></ul>Required Knowledge, Skills & Abilities:<ul><li>Good interpersonal, verbal, and written communication skills.</li><li>Good listening skills</li><li>Computer program experience using LabVIEW, VBA, Python and C#.</li><li>Good working skills of software and tools necessary for job functions including Microsoft Office suite.</li></ul>Education/Experience:Incumbent professional should have a minimum of a bachelor's degree in mathematics, science, or engineering and up to 8-10 years of qualified experience.Clearance:The ability to obtain a secret clearance and Department of Homeland Security suitability is required for this position.Supervisory Responsibilities:NoneWorking Conditions/Equipment:The incumbent professional is expected to work and/or be available during regular business hours. He/she should also generally be available via e-mail or phone during non-business hours as needed to address critical issues or emergencies. He/she may be required to travel on behalf of the company up to 25%.The above job description is not intended to be an all-inclusive list of duties and standards of the position. Incumbents will follow any other instructions, and perform any other related duties as assigned by their supervisor. Powered by ExactHire:160569</div></div>

<h3>Job Description</h3><div>Job Description<div>Position Purpose:The primary purpose of this position is to serve as the data scientist with a split portfolio between the Atlantic City office and the Austin chemistry group.Essential Duties and Responsibilities:<ul><li>Performs data analytics, specifically data clean-up, data processing, predictive modeling, chemometric statistical modeling and analysis, multivariate data analysis, machine learning, and/or data mining, as related to scientific data.</li><li>Applies technical skills to plan and execute assigned project work including development of computational models, programming of detection algorithms, and machine learning.</li><li>Maintains operational capabilities of computation assets as needed by project requirements.</li><li>Leads meetings with company clients by preparing and presenting meeting materials in meetings.</li><li>Appropriately annotates project developed computer code through comments and user manuals.</li><li>Presents technical results through the drafting of technical reports. </li><li>Presents experimental results and recommended actions at internal project meetings.</li><li>Supports business development efforts as needed by drafting technical sections of proposals, providing proposal review, assessing levels of effort required to complete proposed work, and brainstorming technical solutions to client problems.</li><li>Other duties as assigned.</li></ul>Required Knowledge, Skills & Abilities:<ul><li>Ability to plan sequence of experiments to answer complicated technical questions</li><li>Ability to lead group of co-workers in execution of a task</li><li>Software programming proficiency with Java, C, R, Python, and/or MATLAB</li><li>Working knowledge of statistics as it applies to scientific data</li><li>Ability to communicate technical information to non-technical audiences</li><li>Team player with a positive attitude</li><li>Department of Homeland Security Suitability</li><li>Department of Defense Secret Clearance</li><li>Working knowledge of software development practices including Agile development and Git version control</li><li>Sufficient business knowledge to support proposal efforts</li></ul> Education/Experience:Incumbent professional should have a Ph.D. or master's degree in a physical science (preferably chemistry), statistics, or data science and significant experience in computer programming, computational modeling, or software development.Certificates and Licenses: None Clearance: The ability to obtain a Secret clearance and Department of Homeland Security suitability is required for this position.Supervisory Responsibilities: The incumbent professional may oversee junior level staff members performing tasks.Working Conditions/ Equipment: The incumbent professional is expected to work and/or be available during regular business hours. He/she should also generally be available via e-mail or phone during non-business hours as needed to address critical issues or emergencies. He/she may be required to travel on behalf of the company up to 25%.The above job description is not intended to be an all-inclusive list of duties and standards of the position. Incumbents will follow any other instructions and perform any other related duties, as assigned by their supervisor. Powered by ExactHire:160573</div></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

Signature Science, Llc Interview Questions

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Signature Science, Llc Interview Questions

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