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<p>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.</p>

<p>How would you assess the validity of the result?</p>


Experiment Validity

<p>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.</p>

<p>Write a query to randomly sample a row from this table.</p>

<p><strong>Input:</strong></p>

<p><code>big_table</code> table</p>

<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

<p>You are testing hundreds of hypotheses with many <em>t</em>-tests. What considerations should be made?</p>


<p>What is a key disadvantage of the F-test when compared to multiple t-tests?</p>

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?

Hrl Laboratories, Llc Salaries by Position

<p>Based in Southern California with locations in Malibu, Calabasas, Westlake Village, and Camarillo; HRL has been on the leading edge of technology, conducting pioneering research and advancing the state of the art.
As a Senior DevOps Engineer, you'll work with other members of the DevOps team and Quantum Software development teams to facilitate reliable delivery of software in support of scientific research to meet stakeholder needs. You'll be focused on designing, implementing, and maintaining reliable systems and infrastructure for testing, integrating, and deploying software. You will work closely with IT staff to address issues and develop efficient solutions to software development problems. The ideal candidate will have a solid background in software engineering.
Due to working with air-gapped networks and the sensitivity of the information you will be handling, this position is on-site, not remote. Further, you will need to be able to obtain a US Government security clearance.
Essential Duties:
Monitoring and maintaining CI/CD infrastructure on open and air-gapped networks.
Building and maintaining infrastructure for securely transferring software between open and air-gapped networks.
Identifying and implementing improvements to DevOps practices.
Writing and maintaining documentation of software development infrastructure, systems, and processes.
Tracking, vetting, and updating software development dependencies.
Working closely with developers and IT staff to ensure continued reliability of integration and deployment infrastructure.
Contributing to Infrastructure-as-Code (IaC) efforts, automation, and administration of DevOps infrastructure.
Participating in Agile team activities.
Required Skills:
5+ years of experience in Software Development including 2 or more in infrastructure, such as release management, virtualization, packaging, build systems, DevOps, etc.
Solid programming skills, preferably Python.
Expertise with CI/CD infrastructure; preferably GitLab.
Solid scripting skills; Bash or PowerShell.
Expertise with Git, the commonly used distributed version control system.
Problem-solving and troubleshooting.
Understanding of commonly used operating systems, i.e., Windows, MacOS, and Linux, and their quirks.
Agility. Quantum Software is a dynamic environment. You should be able to embrace change and iterative problem solving.
Communication and collaborative orientation.
Required Education:
B.S. in Computer Science or related field, or commensurate experience.
Special Requirements:
U.S. citizenship. Must be able to obtain and maintain a US Government security clearance as required. This position is on-site.
Compensation:
The base salary range for this full-time position is $145,745 - $186,688 + bonus + benefits.
Our salary ranges are determined by role, level, and location. The range displayed on each job posting reflects the target for new hire salaries for the position. Individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training. Your recruiter can share more about the specifics during the hiring process. Please note that the compensation details listed reflect the base salary only, and do not include potential bonus or benefits.
HRL Laboratories is an Equal Employment Opportunity employer and does not discriminate in recruiting, hiring, training or promoting, on the basis of race, ethnicity, color, creed, religion, sex, sexual orientation, gender, gender identity, genetic information, national origin, physical or mental disability, pregnancy, medical condition, age, U.S. military or protected veteran status, union membership, or political affiliation. We maintain a drug-free workplace and perform pre-employment substance abuse testing.
This position must meet Export Control compliance requirements, therefore a "U.S. Person" as defined by 22 C.F.R. § 120.15 is required. "U.S. Person" includes U.S. Citizen, lawful permanent resident, refugee, or asylee.

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