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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 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

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

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At Enact Mortgage Insurance (Nasdaq: ACT), we understand that there's no place like home. That's why we bring our deep expertise, insightful offerings, and extra mile service to work every day to help lenders put more people in homes and keep them there. We're looking for a career professional Software Data Engineer in Raleigh, NC to join us in fulfilling our mission, while utilizing our values of excellence, improvement and connection. In this role, you will be responsible for maintaining and enhancing our risk and pricing predictive models and technology platforms that run the models. The technology stack comprises of Java, Informatica, Hadoop, AWS, and Snowflake as part of the solution. You bring a deep expertise in building and maintaining analytical models, and a bespoke ability to work with your business stakeholders. You're a consummate team player, with a continuous improvement mindset, who can design and lead code reviews. You are comfortable in a highly visible role reporting to the Senior Manager, Data & Analytics Engineering in the IT Organization. LOCATION Enact Headquarters, Raleigh, NC - Hybrid Schedule YOUR RESPONSIBILITIES <ul><li>Build and maintain risk analytics models written in Java (future potential supporting Python based models)</li><li>Build and maintain the necessary frameworks and technology architecture for data pipelines (ETL / ELT) and machine learning pipelines</li><li>Contribute actively to processes needed to achieve operational excellence in all areas, including project management and system reliability.</li><li>Design, Build and launch new data pipelines in production in partnership with the business stakeholders.</li><li>Design and support of new machine learning pipelines as well as dashboards and reports in production.</li></ul> YOUR QUALIFICATIONS <ul><li>BA/BS in Computer Science, Mathematics, Physics, or other technical fields.</li><li>7+ years of strong experience in back-end software engineering in Java, SQL, Python and Data Analysis</li><li>7+ years of experience in Data Engineering, BI, or Data Warehousing using tools like Informatica, Databricks, Talend, Snowflake.</li><li>5+ years in development of data pipelines/ETL for data ingestion, data preparation, data integration, data aggregation, feature engineering, etc.</li><li>Strong analytical skills with high attention to detail and accuracy.</li><li>Demonstrated ability to successfully collaborate with business stakeholders.</li></ul> PREFERRED QUALIFICATIONS <ul><li>Experience working in risk modeling and analytics in financial services companies.</li><li>Working knowledge of AWS ETL tools like Glue, Athena, SQS triggers, Step functions and Tableau.</li></ul> COMPANY Enact is a leading publicly traded U.S. private mortgage insurance provider, offering borrower-centric products that enable lenders and other partners across the U.S. to help people responsibly achieve and maintain the dream of homeownership. By empowering customers and their borrowers, Enact seeks to positively impact the lives of those in the communities in which it serves in a sustainable way. Headquartered in Raleigh, North Carolina, we play an active role in supporting a healthier Triangle community. We also support our colleagues' philanthropic efforts in their home communities across the U.S. Enact values all perspectives, characteristics and experiences, and DEI remains at the forefront of what we do. We strive to create an environment where employees can bring their full, authentic selves to work to help each other and their customers. We are proud to be an equal opportunity employer and all hiring decisions are based on merit, qualifications, and business need. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. WHY WORK AT ENACT We bring innovative thinking to the situations at hand We seek out and incorporate diverse views to strengthen our outcomes We work on challenging and rewarding projects We offer competitive benefits: <ul><li>Hybrid work schedule (shared in-office days Tues/Wed/Thurs)</li><li>Generous Time Off</li><li>40 Hours of Volunteer Time Off</li><li>Tuition Reimbursement and Student Loan Repayment</li><li>Paid Family Leave and Flexible Spending Accounts</li><li>401k with up to 5% employer match</li><li>Fitness and Emotional Wellness Reimbursements</li></ul>

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