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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

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

Drivewealth Salaries by Position

DriveWealth is a global B2B financial technology organization dedicated to democratizing access to financial independence around the world. Our mission is realized through an API-based platform, empowering our partners to offer seamless investing and trading experiences to clients worldwide, all from their mobile devices. Our technology provides partners with a modern, extensible toolkit, enabling traditional investment workflows and innovative techniques like fractional share ownership. DriveWealth has evolved into a global platform offering trading of US equities, mutual funds, ETFs, fixed income, and options. We seek enthusiastic professionals to contribute diverse perspectives and experiences to our Brokerage-as-a-Service platform. Our culture blends the pace and opportunity of a tech start-up with the impact, stability, and significance of Wall Street. We encourage creativity and experimentation while ensuring institutional-grade execution and regulatory compliance in everything we do. We value diversity and inclusion, celebrating the unique differences of our employees as we scale and grow together. We're guided by operating principles grounded in accountability, teamwork, integrity, and solutions built to scale. Join us! About the role At DriveWealth, our Product Managers help bring our mission to life through the design, build, implementation, and iteration of tools that power financial independence. We are looking for a Senior Product Manager to lead our Options offering, owning key delivery milestones and goals centered on product improvement and expansion. Responsible for <ul> <li>Ownership and accountability for the P&L of DriveWealth's options business </li><li>Defining requirements for the options brokerage product, including external-facing features, customer experience, and back-end operational considerations </li><li>Management of all third-party relationships across the options industry, including exchanges, market makers, clearing members, technology vendors, and OCC (Options Clearing Corporation) </li><li>Development of sales and marketing materials and campaigns in conjunction with Business Development, Marketing, and Growth teams </li><li>Identification, tracking, and analysis of key metrics that illustrate the performance of the options product </li><li>Guiding partners and prospects through options, product exploration, and integration </li><li>Refining and articulating DriveWealth's position on options, policies, opportunities, and any related recent events </li><li>Consolidating feedback from internal stakeholders and partners on their experience to continuously improve our options offering </li><li>Working closely with our project managers and engineering team to deliver a best-in-class options offering </li> </ul>Qualifications <ul> <li>Proven ability to design, implement and operate retail and/or institutional options brokerage capabilities </li><li>An ability to roll up your sleeves, lead from the front and act as a 'player/coach', specifically for critical tasks such as defining product requirements. </li><li>Understanding of and comfort navigating trading and post-trade systems and workflows </li><li>Experience overseeing and communicating across a cross-functional team in a matrixed environment. You filter ambiguity and complexity and keep the core team focused on defined priorities and workstreams. </li><li>Excellent communication skills - proven ability to relay a complex narrative to a variety of internal and external stakeholders at the appropriate level </li><li>A track record of successful engagement with external counterparts in the options industry, which can include partners (broker-dealer, retail or institutional), regulators, exchanges or clearing firms </li><li>Embodiment of DriveWealth's Operating Principles, which include accountability, team work, transparency, urgency, and integrity. </li> <li>FINRA Series SIE, 7 & 4 registrations, or a commitment to acquire within the first year of employment at DriveWealth (with support from your Manager) </li><li>Must be in the NY office several days per week </li></ul>Applicants must be authorized to work for any employer in the U.S. DriveWealth is unable to sponsor or take over sponsorship of an employment Visa at this time. Compensation Compensation package offerings are based on candidate experience and technical qualifications, as it relates to the role. These are identified and determined throughout your interviewing experience.Please note: this role is expected to come into our office on a cadence set by the Hiring Manager/Team. New York, NY (Hybrid) Pay Range $185,000-$200,000 USD Benefits <ul> <li>Competitive medical, dental, and vision insurance options </li><li>Mental Health and family planning services </li><li>Unlimited paid time off with ten observed holidays </li><li>16 weeks of paid parental leave for biological and adoptive parents </li><li>Pre-tax commuter benefits </li><li>$2,500 each year to invest in continued education and personal development </li><li>$75 a month in fitness and wellness reimbursement </li><li>Company-provided phone </li><li>Hybrid work experience that allows for flexibility </li><li>For in-office employees, a daily lunch stipend, unlimited snacks, and engaging office space in the Financial District </li></ul> We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation. TO ALL AGENCIES: Please, no phone calls or emails to any employee of DriveWealth outside of the Talent organization. DriveWealth's policy is to only accept resumes from agencies via Greenhouse (ATS). Agencies must have a valid services agreement executed and must have been assigned by the Talent team to a specific requisition. Any resume submitted outside of this process will be deemed the sole property of DriveWealth. In the event a candidate submitted outside of this policy is hired, no fee or payment will be paid.

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