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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?

Statistics

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

Data Scientist????Graduate School of Education, Stanford, California, United States????Information Analytics???????Oct 16, 2025 Post Date???????107547 Requisition # The Stanford Center on Early Childhood, an initiative of the Stanford Accelerator for Learning, seeks a full time Data Scientist to join the RAPID Survey Project team. The Data Scientist will oversee the work of a team of analysts, establishing and maintaining quality standards, reviewing outputs, and ensuring that research processes are executed with precision, consistency, and scientific rigor. Note: This position is a 1-year fixed term appointment that may be renewed based on performance and funding. This position is eligible for a remote work agreement and travel is required for convenings and events. Interested applicants should submit a resume and a cover letter describing why they are interested in this position at this stage of their career. Candidates must be eligible to work in the US. Visa sponsorship is not available for this position. ABOUT US Housed at Stanford Graduate School of Education, the Stanford Accelerator for Learning is the first university-wide initiative connecting scholars across disciplines and with external partners to bridge research, innovation, practice, and policy, and bring quality scalable and equitable learning experiences to all learners, throughout the lifespan. The Stanford Accelerator for Learning focuses on learning challenges most in need of new discoveries, evidence, and solutions and where we believe Stanford can make the most difference. Those include: adult & workforce learning, digital learning, early childhood education and development, equity in learning, learning differences, and policy & systems change. The Stanford Center on Early Childhood (SCEC) is an initiative of the Stanford Accelerator for Learning. The SCEC leverages the current moment of revolutionary science and fosters deep omnidirectional collaboration across sectors, seeking to change the way that research in early childhood is conducted, communicated, and utilized, with the overarching goal that each and every child thrives from the start. POSITION SUMMARY RAPID began as a program of two national surveys of households with children under age 6 and the child care workforce. Led by Philip Fisher, Stanford Center on Early Childhood Director, the RAPID National Survey administers monthly surveys on a rapid-cycle schedule, and has collected data from more than 20,000 households and 12,000 child care providers in all 50 states. The survey and data inform policy, advocacy, academic, parent and practitioner audiences on the experiences, challenges, and strengths of parents of young children and child care providers. The goal is to support parent- and provider-driven policies and programs that equitably and effectively serve families, providers, and young children. RAPID is now implemented in community, state, and national contexts, working in partnership with local and state organizations. The RAPID datasets are extensive and quickly growing, and include both quantitative and qualitative data. The Data Scientist will oversee analyses of all data collected by the RAPID Survey Project. The person in this role will provide oversight and guidance to the RAPID Data Analysts, help strengthen the research process, and review and ensure accuracy and quality of data products. They will guide analysts through review, reflection, and constructive feedback on analytic approaches and outputs and provide final sign-off to ensure the teams work is rigorous, reliable, and high quality. The Data Scientist will be a resource in the production of data dissemination products, such as visualizations, fact sheets, and data briefs. The Data Scientist will maintain rigorous methodological standards, review work, support analysts, and strengthen both the quality of individual products and the skills of the research team. The successful candidate will bring extensive methodological experience, technical skill with analysis tools and software, and content knowledge in early childhood development, education, policy, and/or advocacy. While this role will provide oversight and mentorship, it will not include direct supervision. The Data Scientist will work independently and with minimal supervision under the direction of the Director of the RAPID Survey Project and in collaboration with RAPID Program Managers. Your primary responsibilities will include: Lead and own organization-wide data initiatives (e.g. models, frameworks, platforms, dashboards). Guide, coach and mentor a high performing team of analysts. Identify, leverage and partner with external stakeholders. Prioritize and extract data from a variety of sources such as notes, survey results, medical reports, and laboratory data, and maintain its accuracy and completeness. Determine additional data collection and reporting requirements. Design and customize reports based upon data in the database. Oversee and monitor compliance with processes that ensure high-quality data. Use system reports and analyses to identify potentially problematic data, make corrections, and eliminate root cause for data problems or justify solutions to be implemented by others. Create complex charts and databases, perform statistical analyses, and develop graphs and tables for publication and presentation. Serve as a resource for non-routine inquiries such as requests for statistics or surveys. Provide documentation based on audit and reporting criteria to investigators and research staff. To be successful in this position, you will bring: Bachelor's degree and five years of relevant experience or combination of education and relevant experience. Experience in a quantitative discipline such as economics, finance, statistics or engineering. Ability to direct the work of others, for jobs requiring supervision. Relevant subject matter knowledge. Substantial experience with MS Office and analytical programs. Excellent writing and analytical skills. Ability to prioritize workload. Preferred Education & Experience: Doctoral degree or equivalent in relevant field Content expertise in early childhood, education, policy, and/or advocacy Advanced methodological, statistical, and analytic skills Experience with survey research Ability to coach and mentor analysts Ability to work in a matrixed team environment, collaborating with peers with leadership responsibilities, senior leadership and junior team members Flexible and creative thinking about data analysis Experience working with large data sets Experience working with a geographically distributed team Specific duties and responsibilities may vary depending on department or program needs without changing the general nature and scope of the job or level of responsibility. Employees may also perform other duties as assigned. Physical Requirements*: Sitting in place at computer for long periods of time with extensive keyboarding/dexterity. Occasionally use a telephone. Rarely writing by hand. The expected pay range for this position is $91,699 to $138,688 per annum. Stanford University provides pay ranges representing its good faith estimate of what the university reasonably expects to pay for a position. The pay offered to a selected candidate will be determined based on factors such as (but not limited to) the scope and responsibilities of the position, the qualifications of the selected candidate, departmental budget availability, internal equity, geographic location and external market pay for comparable jobs. WORK STANDARDS: Interpersonal Skills: Demonstrates the ability to work well with Stanford colleagues and clients and with external organizations. Promote Culture of Safety: Demonstrates commitment to personal responsibility and value for safety; communicates safety concerns; uses and promotes safe behaviors based on training and lessons learned. Subject to and expected to comply with all applicable University policies and procedures, including but not limited to the personnel policies and other policies found in the University's Administrative Guide, http://adminguide.stanford.edu. Why Stanford is for You: Imagine a world without search engines or social platforms. Consider lives saved through first-ever organ transplants and research to cure illnesses. Stanford University has revolutionized the way we live and enrich the world. Supporting this mission is our diverse and dedicated 17,000 staff. We seek talent driven to impact the future of our legacy. Our culture and unique perks empower you with: Freedom to grow. We offer career development programs, tuition reimbursement, or audit a course. Join a TedTalk, film screening, or listen to a renowned author or global leader speak. A caring culture. We provide superb retirement plans, generous time-off, and family care resources. A healthier you. Climb our rock wall, or choose from hundreds of health or fitness classes at our world-class exercise facilities. We also provide excellent health care benefits. Discovery and fun. Stroll through historic sculptures, trails, and museums. Enviable resources. Enjoy free commuter programs, ridesharing incentives, discounts and more! We pride ourselves in being a culture that encourages and empowers you. The job duties listed are typical examples of work performed by positions in this job classification and are not designed to contain or be interpreted as a comprehensive inventory of all duties, tasks, and responsibilities. Specific duties and responsibilities may vary depending on department or program needs without changing the general nature and scope of the job or level of responsibility. Employees may also perform other duties as assigned. Consistent with its obligations under the law, the University will provide reasonable accommodations to applicants and employees with disabilities. Applicants requiring a reasonable accommodation for any part of the application or hiring process should contact Stanford University Human Resources at stanfordelr@stanford.edu. For all other inquiries, please submit a contact form. Stanford is an equal employment opportunity and affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law. How to Apply: We invite you to apply for this position by clicking on the Apply for Job button. To be considered, you must submit a cover letter and rsum along with your online application. Finalist must successfully complete a background check prior to working at Stanford University. This is a fixed-term position with an end date of one year and is renewable based on performance and funding Candidates must be eligible to work in the US. Visa sponsorship is not available for this position. Additional Information <ul><li>Schedule: Full-time </li><li>Job Code: 4753 </li><li>Employee Status: Fixed-Term </li><li>Grade: K </li><li>Requisition ID: 107547 </li><li>Work Arrangement : Remote Eligible </li> </ul>

<h5>Business Intelligence Analyst </h5>Department of Public Safety, Stanford, California, United States Information Analytics The Stanford University Department of Public Safety exists to provide a safe, secure atmosphere which is conducive to freedom of expression and movement, for all people and their property at Stanford University, within the constraints of the Federal, State, and Local laws and ordinances. <h5>Core Duties </h5> <ul><li>Provide complex analysis and recommendations regarding data management and the design of dashboard and reports; may develop interactive queries and dashboards for central and distributed users. </li><li>Lead and own organization-wide complex business intelligence reporting and analysis initiatives; ensure initiatives directly support the organizational mission and are delivered on schedule and budget. </li><li>Lead data stewardship efforts and develop the metadata supporting the applicable reporting systems. Define and enforce interface design standards and best practices. Audit compliance and provide direction in non-compliance situations. </li><li>Coordinate the development and enrichment of an enterprise data model assuring reporting system development builds upon the existing data foundation and data model conflicts are resolved. </li><li>Troubleshoot business intelligence environment problems and opportunities for improvement and coordinate with application team to resolve application bottlenecks and performance issues. </li><li>Mentor and support the training of new and existing staff in business intelligence design and development. </li><li>Coordinate the planning, development and presentation of training for users of BI reporting and analysis. </li><li>May plan, mentor, coordinate, monitor and review the work of other information analytics-type staff during all phases of a project. </li> </ul><h5>MINIMUM REQUIREMENTS </h5>Education & Experience: Bachelors degree and seven years of relevant experience or combination of education and relevant experience. Work experience in a quantitative discipline such as economics, finance, statistics or engineering. <h5>Knowledge, Skills and Abilities </h5><ul><li>Knowledge of computer system capabilities, business processes and workflow. </li><li>Strong project management skills and ability to understand and apply the software development lifecycle. </li><li>Demonstrated ability to review business processes and translate into BI reporting and analysis solutions. </li><li>Extensive experience in data analysis and root cause analysis and proven problem solving and analytical thinking capabilities. </li><li>Demonstrated ability with enterprise application and database driven applications. </li><li>Substantial experience with relational and dimensional logical data modeling. </li><li>In-depth knowledge of and ability using MS Office; analytical and business intelligence programs such as OBIEE, business objects, Informatica, Tableau, Matlab, SAS, R, SPSS etc. </li><li>Extensive background and experience with report and analysis design. </li><li>Experience with the application of User Interface and User Experience best practices. </li><li>Strong written and oral communication skills; proven presentation experience and comfort with senior management audiences and effective facilitation skills with diverse groups. </li><li>Ability to prioritize workload and work with minimal supervision. </li> </ul><h5>Physical Requirements </h5><ul><li>Constantly perform desk-based computer tasks. </li><li>Frequently sitting. </li><li>Occasionally stand/walk </li><li>Rarely, writing by hand; life/carry/push/pull objects that weigh up to 10 pounds. </li> </ul><h5>Working Conditions </h5><ul><li>Requires 24?hour response availability seven days. SUDPS personnel are considered essential or required University personnel and shall respond to campus when directed to do so, even with little advanced notice. </li><li>Must wear personal protective equipment as defined/required by job assignments. SUDPS is a public safety agency; in the course and scope of ones duties, personnel will be exposed to potentially dangerous and adverse working conditions. </li><li>May be exposed to persons who pose a danger to self or others, active laboratories, outdoor work and inclement weather conditions. </li> </ul><h5>Special Requirements </h5><ul><li>Applicant must pass a detailed police background investigation including a search of local, state, and national files for criminal history. </li><li>Must be able and willing to respond to and work large?scale special events as well as unplanned critical incidents, sometimes with little advance notice. </li><li>All personnel working for the department are responsible for providing public safety services to the community. </li><li>Personnel will be trained to perform duties outside their normal day?to?day responsibilities, such as dispatching and/or emergency call taking and/or special events logistics support, so they are able to provide support during emergencies and special events. Training includes familiarity with the Incident Command System. </li> </ul>The job duties listed are typical examples of work performed by positions in this job classification and are not designed to contain or be interpreted as a comprehensive inventory of all duties, tasks, and responsibilities. Specific duties and responsibilities may vary depending on department or program needs without changing the general nature and scope of the job or level of responsibility. Employees may also perform other duties as assigned. The expected salary range for this position is $168,297 - $202,467 per annum. Stanford University provides pay ranges representing its good faith estimate of what the University reasonably expects to pay for a position. The pay offered to a selected candidate will be determined based on factors such as (but not limited to) the scope and responsibilities of the position, the qualifications of the selected candidate, departmental budget availability, internal equity, geographic location and external market pay for comparable jobs. At Stanford University, base pay represents only one aspect of the comprehensive rewards package. The Cardinal at Work website provides detailed information on Stanfords extensive range of benefits and rewards offered to employees. Specifics about the rewards package for this position may be discussed during the hiring process. Consistent with its obligations under the law, the University will provide reasonable accommodation to any employee with a disability who requires accommodation to perform the essential functions of their job. Stanford is an equal employment opportunity and affirmative action employer. All qualified applicants will receive consideration for employment regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law. <h5>Additional Information </h5> <ul><li>Schedule: Full?time </li><li>Job Code: 4739 </li><li>Employee Status: Regular </li><li>Grade: L </li><li>Requisition ID: 107570 </li><li>Work Arrangement: On Site </li> </ul> #J-18808-Ljbffr

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

Stanford University Interview Questions

Stanford University Interview Guides

Stanford University Interview Questions

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