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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>Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.</p>

<p>What factors could have biased this result, and what would you look into?</p>


<p>What could potentially bias the average boarding time in favor of an airline that only flies domestically?</p>

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

<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?

Zilliz Salaries by Position

<h3>Job Description</h3><div>Job Description<div><div><p><strong>About Zilliz</strong></p><p>Zilliz is a fast-growing startup developing the industry's leading vector database company for enterprise-grade AI. Founded by the engineers behind Milvus, the world's most popular open-source vector database, the company builds next-generation database technologies to help organizations quickly create AI applications. On a mission to democratize AI, Zilliz is committed to simplifying data management for AI applications and making vector databases accessible to every organization.</p></div><div><strong>What you will do:</strong></div><div><ul><li>Develop distributed database systems using Zilliz's innovative data science platforms.</li><li>Create request plans, develop new systems, and perform prototype verification and testing.</li><li>Design and write core architecture code. Provide creative solutions to technical issues that arise during the product development process.</li><li>Take ownership of product performance and stability.</li><li>Research emerging technology to optimize the performance of underlying distributed platforms.</li><li>Manage the Milvus open-source community and broaden Zilliz's reach worldwide.</li></ul></div><div><strong>What we are looking for:</strong></div><div><ul><li>4+ years of experience in developing database systems </li><li>Active contributor to one or more infrastructure software such as Snowflake, CockroachDB, Oracle RDBMS, Google BigQuery, Spanner, Redshift, Aurora, Cosmos DB, MySQL, PostgreSQL, Hudi, Delta Lake, Iceberg, Ray, Spark, Flink, Kafka, Redis, ElasticSearch, etc.</li><li>Bachelor's degree or above in computer science, software engineering, or other relevant disciplines.</li><li><div>Willing to adapt to a fast-changing environment (i.e. the different stages of a startup company)</div></li></ul></div><div><div><strong>Benefits:</strong></div><ul><li><div>Competitive compensation (cash + equity)</div></li><li><div>Regular bonus and equity refresh opportunities</div></li><li><div>Medical, dental, and vision insurance</div></li><li><div>Paid time off, including vacation, sick leave, and global reset/wellbeing days</div></li><li><div>Generous 401(k) and regional retirement plans</div></li></ul></div><div><div>Compensation Range</div><div>$160,000—$230,000 USD</div></div><div><p>Zilliz is committed to building an inclusive and diverse workforce. We are an Equal Opportunity Employer and welcome people from all backgrounds, experiences, abilities, and perspectives. All qualified applicants will receive consideration for employment regardless of race, color, national origin, religion, sexual orientation, gender, gender identity, age, physical disability, or length of time spent unemployed.</p></div></div></div>

<h3>Job Description</h3><div>Job Description<div><div><p><strong>About Zilliz</strong></p><p>Zilliz is a fast-growing startup developing the industry's leading vector database company for enterprise-grade AI. Founded by the engineers behind Milvus, the world's most popular open-source vector database, the company builds next-generation database technologies to help organizations quickly create AI applications. On a mission to democratize AI, Zilliz is committed to simplifying data management for AI applications and making vector databases accessible to every organization.</p></div><p><strong>What you will do:</strong></p><ul><li>Optimize core algorithm libraries and create novel algorithms for vector preprocessing, index building, and querying.</li><li>Analyze algorithm performance, and formulate technical plans and benchmarks for improvements.</li><li>Participate in the development of high-performance vector indexing frameworks.</li><li>Provide support for the optimization of popular vector indexing algorithms.</li><li>Implement high-performance algorithms from research papers.</li></ul><p><strong>What we are looking for:</strong></p><ul><li>Proficiency in C++ is a must.</li><li>Embracing the engineering mentality. Experience designing and developing large-scale infrastructure software such as distributed databases or parallel data processing frameworks is required.</li><li>Familiarity with parallel programming (e.g., OpenMP) and micro-optimization techniques.</li><li>Strong analytical skills and trouble-shooting ability. Strong sense of responsibility and ownership.</li><li>Experience in vector similarity search algorithms or GPU programming (e.g., CUDA) is preferred.</li></ul><p><strong>Benefits:</strong></p><ul><li>Competitive compensation (cash + equity).</li><li>Regular bonus and equity refresh opportunities.</li><li>Medical, dental, and vision insurance.</li><li>Paid time off, including vacation, sick leave, and global reset/wellbeing days.</li><li>Generous 401(k) and regional retirement plans.</li><li>Hybrid work model/Remote work opportunities available.</li></ul><div><div>Compensation Range</div><div>$135,000—$200,000 USD</div></div><div><p>Zilliz is committed to building an inclusive and diverse workforce. We are an Equal Opportunity Employer and welcome people from all backgrounds, experiences, abilities, and perspectives. All qualified applicants will receive consideration for employment regardless of race, color, national origin, religion, sexual orientation, gender, gender identity, age, physical disability, or length of time spent unemployed.</p></div></div></div>

<h3>Job Description</h3><div>Job Description<div><div><p><strong>About Zilliz</strong></p><p>Zilliz is a fast-growing startup developing the industry's leading vector database company for enterprise-grade AI. Founded by the engineers behind Milvus, the world's most popular open-source vector database, the company builds next-generation database technologies to help organizations quickly create AI applications. On a mission to democratize AI, Zilliz is committed to simplifying data management for AI applications and making vector databases accessible to every organization.</p></div><div><strong>What you will do:</strong></div><div><ul><li>Hire, manage, and mentor teams of software engineers.</li><li>Execute against a comprehensive R&D strategy and company roadmap aligned with the company's goals and objectives.</li><li>Develop distributed database systems using Zilliz's innovative data science platforms.</li><li>Create request plans, develop new systems, and perform prototype verification and testing.</li><li>Design and write core architecture code and provide creative solutions to technical issues that arise during the product development process.</li><li>Take ownership of product performance and stability.</li><li>Research emerging technology to optimize the performance of underlying distributed platforms.</li><li>Manage the Milvus open-source community and broaden Zilliz's reach worldwide.</li></ul></div><div><strong>What we are looking for:</strong></div><div><ul><li>3+ years of experience of engineering leadership including; hiring, mentoring, delivering against priorities, and managing performance</li><li>5+ years of experience developing database or AI / ML systems </li><li>In-depth knowledge of distributed systems, low-level optimizations, search algorithms or storage systems.</li><li>Previous experience designing and developing large-scale cloud native systems.</li><li>Active user or contributor to one or more infrastructure software such as Snowflake, CockroachDB, Oracle RDBMS, Google BigQuery, Spanner, Redshift, Aurora, Cosmos DB, MySQL, PostgreSQL, Hudi, Delta Lake, Iceberg, Ray, Spark, Flink, Kafka, Redis, ElasticSearch, etc.</li><li>Bachelor's degree or above in computer science, software engineering, or other relevant disciplines.</li></ul></div><div><div><strong>Benefits:</strong></div><ul><li><div>Competitive compensation (cash + equity)</div></li><li><div>Regular bonus and equity refresh opportunities</div></li><li><div>Medical, dental, and vision insurance</div></li><li><div>Paid time off, including vacation, sick leave, and global reset/wellbeing days</div></li><li><div>Generous 401(k) and regional retirement plans</div></li></ul></div><div><div>Compensation Range</div><div>$200,000—$250,000 USD</div></div><div><p>Zilliz is committed to building an inclusive and diverse workforce. We are an Equal Opportunity Employer and welcome people from all backgrounds, experiences, abilities, and perspectives. All qualified applicants will receive consideration for employment regardless of race, color, national origin, religion, sexual orientation, gender, gender identity, age, physical disability, or length of time spent unemployed.</p></div></div></div>

<p>What you will do: Hire, manage, and mentor teams of software engineers.
Execute against a comprehensive R&D strategy and company roadmap aligned with the company's goals and objectives.
Develop distributed database systems using Zilliz’s innovative data science platforms.
Create request plans, develop new systems, and perform prototype verification and testing.
Design and write core architecture code and provide creative solutions to technical issues that arise during the product development process.
Take ownership of product performance and stability.
Research emerging technology to optimize the performance of underlying distributed platforms.
Manage the Milvus open-source community and broaden Zilliz’s reach worldwide.
What we are looking for: 3+ years of experience of engineering leadership including; hiring, mentoring, delivering against priorities, and managing performance
5+ years of experience developing database or AI / ML systems
In-depth knowledge of distributed systems, low-level optimizations, search algorithms or storage systems.
Previous experience designing and developing large-scale cloud native systems.
Active user or contributor to one or more infrastructure software such as Snowflake, CockroachDB, Oracle RDBMS, Google BigQuery, Spanner, Redshift, Aurora, Cosmos DB, MySQL, PostgreSQL, Hudi, Delta Lake, Iceberg, Ray, Spark, Flink, Kafka, Redis, ElasticSearch, etc.
Bachelor’s degree or above in computer science, software engineering, or other relevant disciplines.

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