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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?

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

Uc Irvine Salaries by Position

Overview: UCI Health is the clinical enterprise of the University of California, Irvine, and the only academic health system based in Orange County. UCI Health is comprised of its main campus, UCI Medical Center, a 459-bed, acute care hospital in in Orange, Calif., four hospitals and affiliated physicians of the UCI Health Community Network in Orange and Los Angeles counties and ambulatory care centers across the region. Listed among Americas Best Hospitals by U.S. News & World Report for 23 consecutive years, UCI Medical Center provides tertiary and quaternary care and is home to Orange Countys only National Cancer Institute-designated comprehensive cancer center, high-risk perinatal/neonatal program and American College of Surgeons-verified Level I adult and Level II pediatric trauma center, gold level 1 geriatric emergency department and regional burn center. UCI Health serves a region of nearly 4 million people in Orange County, western Riverside County and southeast Los Angeles County. To learn more about UCI Health, visit www.ucihealth.org. Responsibilities: Position Summary: The incumbent will be responsible for creating and maintaining enterprise reporting and analytics solutions using electronic health data. The incumbent will work on a multidisciplinary team of developers within the Enterprise Data and Analytics Department and will collaborate with other institutions across the University of California Health. The incumbent will use UCI Health software such as PowerBI, Tableau, Epic Reporting Workbench, Epic Radar, and the enterprise data warehouse to deliver high quality reports and analytic solutions. This includes quality metrics, regulatory requirements, and general clinical/operational reporting. Qualifications: Total Compensation We offer a wealth of benefits to make working at UCI even more rewarding. These benefits may include medical insurance, sick and vacation time, retirement savings plans, and access to a number of discounts and perks. Please utilize the links listed here to learn more about our compensation practices and benefits. Required Qualifications: <ul><li>Bachelor's Degree in Computer Science or related field and/or combination of education and equivalent work experience </li><li>Ability to establish and maintain effective working relationships across the Health System </li><li>Ability to maintain a work pace appropriate to the workload </li><li>Must demonstrate customer service skills appropriate to the job </li><li>Excellent written and verbal communication skills in English </li><li>Ability to perform basic performance tuning to optimize queries to meet user needs </li><li>Must possess the skill, knowledge and ability essential to the successful performance of assigned duties </li><li>Minimum 3 years of data analytics experience using relational databases </li><li>Minimum 3 years experience working with SQL </li><li>Minimum 3 years experience with MS SQL server or Oracle as well as reporting tools such as SSRS, Tableau, etc </li></ul> Preferred Qualifications: <ul><li>Experience developing and maintaining technical documentation within a centralized code repository </li><li>Experience using Collibra or similar Data Governance platform </li><li>Experience utilizing Lean concepts including visibility walls, problem solving A3's, and Gemba rounding principles </li><li>Clarity Certification </li><li>Experience in software development life cycle </li><li>2+ years of experience working with EPIC EHR </li><li>Knowledge of University and medical center organizations, policies, procedures and forms </li><li>Master's Degree in Computer Science or related field and/or combination of education and equivalent work experience </li><li>Experience working in healthcare analytics </li><li>Experience working with SSRS, SSIS, PowerBI, and Tableau </li></ul> Conditions of Employment: The University of California, Irvine (UCI) seeks to provide a safe and healthy environment for the entire UCI community. As part of this commitment, all applicants who accept an offer of employment must comply with the following conditions of employment: <ul> <li>Background Check and Live Scan </li><li>Legal Right to Work in the United States </li><li>Vaccination Policies </li><li>Smoking and Tobacco Policy </li><li>Drug Free Environment </li></ul> The following additional conditions may apply, some of which are dependent upon business unit or job specific requirements. <ul> <li>California Child Abuse and Neglect Reporting Act </li><li>E-Verify </li><li>Pre-Placement Health Evaluation </li></ul> Details of each policy may be reviewed by visiting the following page: https://hr.uci.edu/new-hire/conditions-of-employment.php Closing Statement: The University of California, Irvine is an Equal Opportunity/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, age, protected veteran status, or other protected categories covered by the UC nondiscrimination policy. We are committed to attracting and retaining a diverse workforce along with honoring unique experiences, perspectives, and identities. Together, our community strives to create and maintain working and learning environments that are inclusive, equitable, and welcoming. UCI provides reasonable accommodations for applicants with disabilities upon request. For more information, please contact UCI's Employee Experience Center (EEC) at eec@uci.edu or at (949) 824-0500, Monday - Friday from 8:30 a.m. - 5:00 p.m.

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