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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 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

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

Nasdaq Salaries by Position

Internship Overview: Nasdaq's Internship Program provides outstanding opportunities for students to gain hands-on experience during a 10-week internship. As part of the program, you will partner with a mentor, network with senior colleagues, and take on a real-world project with real-world impact and gain practical skills that will help shape your career for years to come. Additionally, you will meet with senior leaders and participate in professional development activities throughout your internship. Internship Program Requirements: - Must be a rising senior enrolled full time for the upcoming semester in an accredited college or university in Business, Finance, Economics or related major and on-track to graduate - 10-week commitment with availability to start in June - Proactive, responsive team player who can thrive in a dynamic and changing environment - Motivated self-starter who is results-driven - Exceptional use of Microsoft Excel & PowerPoint required - Possess a curious nature around learning new topics and solving problems Come as You Are Nasdaq is an equal opportunity employer. We positively encourage applications from suitably qualified and eligible candidates regardless of age, color, disability, national origin, ancestry, race, religion, gender, sexual orientation, gender identity and/or expression, veteran status, genetic information, or any other status protected by applicable law. 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 an accommodation.

Dorsey, Wright Associates, a subsidiary of Nasdaq, is currently seeking an Asset Management Research Analyst to become part of our team in Richmond, Virginia. The ideal candidate will currently hold their Series 65 professional designation (or obtain the license shortly after hire), want to learn our company from the ground up and want to be involved with making a direct impact on clients' lives while also bringing their experiences and knowledge to the company. Candidates that fit into our firm and culture will desire to be in a wealth management RIA environment and have a passion for tactical market analytics and portfolio analysis. In this position you will produce research material on specialized areas (equities, fixed-income etc.) in order to provide our clients (RIAs, Financial Advisors, Fund Managers, etc.) with high level, strategic investment related advice to support investment decisions. You will prepare reports covering market trends as well as indicators based upon the Point & Figure and Relative Strength methodologies for both internal and external purposes. You will work directly with clients to set both day-to-day strategies and long-term strategies. Responsibilities: <ul><li>Through technical analysis and research you will work as a part of the DWA analyst team on a variety of projects and initiatives to support the DWA Tools & Services and Indexing businesses. </li><li>Supports and provides insight to other staff members on the recommendation evaluations and on-going monitoring of investment managers.</li><li>Develop and maintain data and infrastructure to leverage our work into better knowledge management and customer service.</li><li>Acquire market knowledge, gain exposure and familiarity with issues affecting Financial Advisors and other clients of the business.</li><li>Participate in producing custom made reports and presentations utilizing the technical methodology. </li><li>Participates/ initiates efforts to build industry knowledge, company contracts and market intelligence aligned with the Companies initiatives.</li><li>Responsible for writing research reports and analyst notes.</li><li>Provide real-time support to clients via the phone, e-mail, and chat services. </li></ul> <ul><li>Education Required: Finance/business academic degree.</li><li>Experience Required: At least 2 year.</li><li>Special Qualifications: SEC licensing such as Series 65</li><li>This position offers the opportunity for a hybrid work environment (2 days a week in office), providing flexibility and accessibility for qualified candidates.</li></ul> Come as You Are Nasdaq is an equal opportunity employer. We positively encourage applications from suitably qualified and eligible candidates regardless of age, color, disability, national origin, ancestry, race, religion, gender, sexual orientation, gender identity and/or expression, veteran status, genetic information, or any other status protected by applicable law. 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 an accommodation. What We Offer We're proud to offer a competitive rewards package that is meaningful, recognizes the unique needs of our employees and their families and incentivizes employees for their contribution to Nasdaq's overall success. In addition to base salary, Nasdaq offers significant other compensation (annual bonus/commissions and equity), benefits, and opportunity for growth. Exact compensation may vary based on several job-related factors that are unique to each candidate, including but not limited to: skill set, experience, education/training, business needs and market demands. Nasdaq's programs and rewards are intended to allow our employees to: <ul><li>Secure Wealth: 401(k) program with 6% employer match, Employee Stock Purchase Program with 15% discount, Student loan repayment program up to $10k, Company paid life and disability plans, Generous paid time off</li><li>Prioritize Health: Comprehensive medical, dental and vision coverage, Health spending account with employer contribution, Paid flex days to support mental wellbeing, Gym membership discounts</li><li>Care for Family: Hybrid home/office schedule (for most positions), Paid parental leave, Fertility benefits, Paid bereavement leave</li><li>Connect with Community: Company gift matching program, Employee resource groups, Paid volunteer days</li><li>Grow Career: Education Assistance Program, Robust job skills training and Professional development opportunities</li></ul> For more information, visit Nasdaq Benefits & Rewards Career page

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