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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

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?

Eclinical solutions Salaries by Position

eClinical Solutions helps life sciences organizations around the world accelerate clinical development initiatives with expert data services and the elluminate Clinical Data Cloud - the foundation of digital trials. Together, the elluminate platform and digital data services give clients self-service access to all their data from one centralized location plus advanced analytics that help them make smarter, faster business decisions. The eClinical Solutions Engineering team has true greenfield opportunities for software engineers who want to develop innovative revenue-generating products that are revolutionizing the life sciences industry. You will work on a team that is developing enterprise-level clinical data software. At eClinical Solutions, you will be recognized and rewarded for your ideas and accomplishments, all while contributing to the latest disruptive technology incorporating modern software architectures, data science, and advanced analytics. You will make an impact: As a Principal/Senior Software Engineer, you will be a core member of the elluminate Product Development team. elluminate is a next generation data integration and analytics cloud platform that enables life sciences organizations to optimize the aggregation, standardization, and analysis of their data throughout the clinical development life cycle. You will be primarily responsible for the design and development of core modules for the platform and will be involved in all phases of the software development lifecycle, including reviewing functional specifications, design, development, unit testing, code reviews and release management. Accelerate your skills and career within a fast-growing company while impacting the future of healthcare. Your day to day: <ul><li>Work with the Engineering team to design, develop, test, and deploy highly interactive and data driven web applications </li><li>Apply good technical practices and contribute to the application architecture with a focus on scalability, maintainability, security, and performance </li></ul><ul><li>Design and write unit tests and participate in code reviews </li><li>Research and utilize new technologies on an ongoing basis </li><li>Collaborate with the Software Quality Assurance team to test the system functionality </li><li>Provide diagnostic support and fix defects as needed </li><li>Provide technical support for existing elluminate product releases </li><li>Provide technical guidance, training and support to other Engineers </li><li>Ensure compliance with eClinical Solutions and industry quality standards, regulations, guidelines and procedures </li><li>Other duties as assigned </li></ul> Take the first step towards your dream career. Here is what we are looking for in this role. Qualifications: <ul><li>Bachelor's degree or Master's degree in Computer Science and/or equivalent work experience </li><li>Excellent knowledge of English </li></ul><ul><li>10+ years in software design and development using the Microsoft technology stack preferred </li><li>Master level expertise in C# and ASP.Net MVC </li><li>Proficiency in relational database concepts, including SQL queries, data modeling and design, preferably in Microsoft SQL Server </li><li>Working knowledge in HTML, CSS, JavaScript and Angular </li><li>Thorough understanding of the fundamentals of software design principles, patterns, and practices </li></ul><ul><li>Strong Software Development Lifecycle experience (Agile methodology experience is preferred) </li><li>Ability to write optimized yet clean code that performs well and is also easy to maintain </li><li>Experience with secure development including knowledge of known vulnerabilities and countermeasures </li><li>General experience with business intelligence platforms such as Qlik Sense, Spotfire or similar tools is a plus. Specific experience integrating Qlik Sense with web applications is a huge plus </li><li>Good documentation skills and ability to contribute to relevant software documents such as features description, acceptance criteria, design documents, release notes, etc. </li><li>Strong technical project management experience. Must be able to estimate work effort and manage timelines effectively to meet deadlines </li><li>Experience working with SQA Test Engineers in test driven design - where developers work in collaboration with Test Engineers to write test cases against new features before implementation to address defects </li><li>Proven ability to work independently as well as with other team members (Start-Up environment experience is a plus) </li><li>Must be a critical thinker and able to analyze and evaluate trade-offs in making design decisions </li><li>Excellent verbal and written communication skills </li></ul> Accelerate your skills and career within a fast-growing company while impacting the future of healthcare. We have shared our story, now we look forward to learning yours! eClinical is a winner of the 2023 Top Workplaces USA national award! We have also received numerous Culture Excellence Awards celebrating our exceptional company vision, values, and employee experience. See all the details here: https://topworkplaces.com/company/eclinical-solutions/ eClinical Solutions is a people first organization. Our inclusive culture values the contribution that diversity brings to our business. We celebrate individual experiences that connect us and that inspire innovation in our community. Our team seeks out opportunities to learn, grow and continuously improve. Bring your authentic self, you are welcome here! We are proud to be an equal opportunity employer that values diversity. Our management team is committed to the principle that employment decisions are based on qualifications, merit, culture fit and business need.

Eclinical solutions Interview Questions

Eclinical solutions Interview Guides

Eclinical solutions Interview Questions

Eclinical solutions Salaries by Position

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