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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>Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.</p>

<p>The company has been consistently growing new users in the city from January to March.</p>

<p>What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?</p>


<p>What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?</p>

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

Iso Salaries by Position

<p>Company Description We help the world see new possibilities and inspire change for better tomorrows. Our analytic solutions bridge content, data, and analytics to help business, people, and society become stronger, more resilient, and sustainable. Job Description Come be part of something new and exciting at a well-established analytical company. Help build scalable solutions for an industry leading catastrophe modeling company. At Extreme Event Solutions, a Verisk business, you will be part of a team of full-stack developers taking on new initiatives which will solve complex problems using state-of-the-art technology. Create a positive and lasting impact on the business while building an exciting career full of meaningful work. You will find the support, coaching, and training you need to excel at your role. Our culture of innovation means your ideas will be heard Be a part of a dynamic software development group at Verisk Extreme Event Solution, contributing to design and development of scalable analytic solution with high performance. You are expected to work in an agile team to plan and design new features, write clean, testable, and performant code, and create automatic tests. Responsibilities : Lead architecture, design, development of SaaS platform analytical algorithms, solutions, and tooling Design algorithms for efficient use of compute and memory resources Enhance functional capabilities and performance of existing system Proactively contribute improvements to code quality, robustness, and development processes Investigate and resolve customer inquiries and software defects Analyze & solve difficult problems across the stack Design and write automatic test cases Maintain and contribute to testing, CI, and DevOps infrastructure Collaborate with team members Follow an agile development methodology Participate in product planning, requirements analysis, and documentation efforts Qualifications Strong understanding of object-oriented design & programming concepts. Strong knowledge of design patterns Minimum 5 years developing Windows/Linux server-based applications using C++ Good understanding of memory management and performance optimization Minimum 2 years of working experience with AWS technologies, including but not limited to, Lambda, Batch, ECS, etc. Enthusiastic, Passionate, quick learner with and strong written and verbal communication skills Possess a positive attitude and ability to multi-task, stay organized in a dynamic and collaborative teamwork environment, and attitude to get things done Experience in one or more of the following areas is a strong advantage: Distributed cloud-based applications development Parallel computing Algorithm design and development Low-level computer architecture Operating system internals Relational database technologies Message-oriented communication Python, C# Docker Education : BS Degree required in Computer Science (or equivalent) MS Degree preferred LI-ZP1 LI-Hybrid Additional Information For over 50 years, Verisk has been the leading data analytics and technology partner to the global insurance industry by delivering value to our clients through expertise and scale. We empower communities and businesses to make better decisions on risk, faster. At Verisk, you'll have the chance to use your voice and build a rewarding career that's as unique as you are, with work flexibility and the support, coaching, and training you need to succeed. For the eighth consecutive year, Verisk is proudly recognized as a Great Place to Work for outstanding workplace culture in the US, fourth consecutive year in the UK, Spain, and India, and second consecutive year in Poland. We value learning, caring and results and make inclusivity and diversity a top priority. In addition to our Great Place to Work Certification, we've been recognized by The Wall Street Journal as one of the Best-Managed Companiesand by Forbesas a World's Best Employer and Best Employer for Women, testaments to the value we place on workplace culture. We're 7,000 people strong. We relentlessly and ethically pursue innovation. And we are looking for people like you to help us translate big data into big ideas. Join us and create an exceptional experience for yourself and a better tomorrow for future generations. Verisk Businesses Underwriting Solutions- provides underwriting and rating solutions for auto and property, general liability, and excess and surplus to assess and price risk with speed and precision Claims Solutions- supports end-to-end claims handling with analytic and automation tools that streamline workflow, improve claims management, and support better customer experiences Property Estimating Solutions- offers property estimation software and tools for professionals in estimating all phases of building and repair to make day-to-day workflows the most efficient Extreme Event Solutions- provides risk modeling solutions to help individuals, businesses, and society become more resilient to extreme events. Specialty Business Solutions- provides an integrated suite of software for full end-to-end management of insurance and reinsurance business, helping companies manage their businesses through efficiency, flexibility, and data governance Marketing Solutions- delivers data and insights to improve the reach, timing, relevance, and compliance of every consumer engagement Life Insurance Solutions- offers end-to-end, data insight-driven core capabilities for carriers, distribution, and direct customers across the entire policy lifecycle of life and annuities for both individual and group. Verisk Maplecroft- provides intelligence on sustainability, resilience, and ESG, helping people, business, and societies become stronger Verisk Analytics is an equal opportunity employer. All members of the Verisk Analytics family of companies are equal opportunity employers. We consider all qualified applicants for employment without regard to race, religion, color, national origin, citizenship, sex, gender identity and/or expression, sexual orientation, veteran's status, age or disability . Verisk's minimum hiring age is 18 except in countries with a higher age limit subject to applicable law. https://www.verisk.com/company/careers/ Unsolicited resumes sent to Verisk, including unsolicited resumes sent to a Verisk business mailing address, fax machine or email address, or directly to Verisk employees, will be considered Verisk property. Verisk will NOT pay a fee for any placement resulting from the receipt of an unsolicited resume. https://www.verisk.com/privacy-policies/data-privacy-notice-for-employees-applicants-and-independent-contractors/</p>

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