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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

Say you work for an e-commerce website that receives clickstream data from Kafka on a daily basis. You’re asked to design a data analytics solution for storing and querying raw data, with a two-year retention period.

The current data volume is around 600 million events daily.

What kind of data analytics solution would you design, keeping costs in mind?

Design a solution to store and query raw data from Kafka on a daily basis.

Clickstream Data

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?

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**_This is not a position for which sponsorship will be provided. Individuals with temporary visas or who need sponsorship now or in the future are not eligible for hire at this time._** We are looking for a skilled Data Science intern for our Summer 2025 internship program. Our Data science teams here at the DriveTime Family of Brands act as internal consultants to deliver immediate value and design long-term solutions to provide a fundamental change to all portions of our business. As an intern, you will have the opportunity to gain hands-on experience working with cutting-edge technologies. A successful candidate should have a background in coding and programming languages such as Python, SQL and other statistical coding languages. The data science interns will be responsible for things like: + Conduct data analysis and provide insights to support business decision-making processes + Assist in developing and implementing data models, algorithms, and predictive models + Utilize statistical and machine learning techniques to extract knowledge and patters from data + Assist with developing innovative ways to increase data intelligence within the business + Present results of analysis to leaders and colleagues **So what are we looking for?** + **A mind for the details.** Okay, we know detail-oriented is on about every job description but we really mean it! + **Intellectual curiosity.** Why? What? How? Do you find yourself always wanting to learn more and broaden your knowledge base? If so, this could be the role for you! + **Fantastic problem solver.** Your job is not only to find the problem, but more importantly, find the solution. + **Agile in a fast paced environment.** We move, and we move quickly. Thriving in an environment that never stops, is a must. + **Excellent verbal and written communication skills.** The ability to talk and write with confidence, charisma and competence for a wide variety of audiences including management. **The Specifics.** + Bachelors or masters student with a graduation date between December 2025 May 2026 + Pursuing a degree in Data Science, Statistics, Mathematics, Physics, Computer Science, or related discipline + You have a GPA of 3.5 or higher + Able to read and write in Python (R is a plus!) + Working knowledge in SQL, Tableau and Excel + Our internship program is 11 weeks starting May 2025 August 2025 + Internships will be base our of our Home offices in Tempe, AZ and Dallas, TX + You can expect a regular on-site schedule; Monday-Friday, 40 hours per week + Relocation not provided for internship **So What About the Perks? Perks matter.** + **Not Just Coffee Runs.** Were talking real world experience. Youll walk away from our internship program with hands-on experience, completed projects, full portfolios, and newly developed skills. + **Who Says You Have to Walk Away?** Across both our Tempe, AZ and Dallas, TX offices, over 60% of our interns stay through the fall semester, return the following summer, or are brought on full-time after graduation. + **Growth & Development.** You will be mentored by industry professionals, be given guidance along the way, and the tools to be successful. + **Philanthropy: Give for Good.** We are proud to be difference makers in our communities. We dedicate time for our Interns to give back with us. + **Gratitude is Green.** Out Internship Program is paid, because, well money matters! **Anything Else? Absolutely.** DriveTime Family of Brands is Great Place to Work Certified! And get this: 90% of our rockstar employees say they feel right at home here. We could spend a lot of time having you read about ALL our awards, but well save time (and practice some humility) just naming a few others; Comparably Awards: Best Company for Diversity, Best Company Culture and Best Company Leadership, oh and dont forget Phoenix Business Journal Healthiest Employers (okay, well stop there)! Hiring is contingent upon successful completion of our background and drug screening process. DriveTime is a drug-free, tobacco-free workplace and an Equal Opportunity Employer. And when it comes to hiring, we don't just look for the right person for the job, we seek out the right person for DriveTime. Buckle up for plenty of opportunities to grow in a professional, fun, and high-energy environment!

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