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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?

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.

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

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

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?

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?

Strategic Staffing Solutions Salaries by Position

Data Engineer LeadRichmond VA 12 month contract Financial client looking to hire a Data Engineer with at least 5 years of experience specializing in AWS (fargate), Docker Python ETL and Snowflake

STRATEGIC STAFFING SOLUTIONS (S3) HAS AN OPENING! Strategic Staffing Solutions is currently looking for a Data Engineer , a W2 contract opportunity with one of our largest clients! Candidates should be willing to work on our W2 ONLY No C2C Job Title: Data Engineer Location: Richmond, Virginia Schedule: Hybrid Role Type: W2 ONLY Contract Length: 12 months Skill Requirements: <ul> <li>Supports Snowflake data warehouse (10K+ active users)</li> <li>Assist in completing initiatives for compliance of the platform</li> <li>Must have experience: SQL, python, spark, familiar with software development life cycle</li> <li>Nice to have: Snowflake experience.</li> </ul> "Beware of scams. S3 never asks for money during its onboarding process." Job ID: JOB-238371 Publish Date: 08 Oct 2024

STRATEGIC STAFFING SOLUTIONS HAS AN OPENING! Strategic Staffing Solutions is currently looking for a Data Engineer for a contract opening with one of our largest clients! This is a Contract Opportunity with our company that MUST be worked on a W2 ONLY, NO visa sponsorship or C2C eligibility for this position.The details are below. Job Title: Data Engineer Contract: 18 Months Location: Charlotte, NC Job/Role Description: •15 years of experience in software development •5 years of experience in driving technical collaboration across multiple teams and organizations. •Experience building and improving Information Retrieval and Ranking, Machine Learning, Embedding systems. •Experience Developing and implementing machine learning models using Google Vertex AI & Python in an application of Generative AI •Experience in indexing, retrieval, and ranking stacks. •Understanding of LLM fine-tuning, distillation, data generation, and prompt engineering across a large variety of tasks. •Ability to work cross-functionally, partnering with groups (e.g., Engineering, Product Management, AI COE, UX and UI), and brokering trade-offs with stakeholders and understanding their needs. •Cloud Computing •Cloud Architecture •Cloud Based Technologies Job ID: JOB-237246 Publish Date: 16 Aug 2024

STRATEGIC STAFFING SOLUTIONS HAS AN OPENING! Business Analyst Location:Detroit, MI ** Remote Duration: 12+ Months Role Type: W2 Contract Engagement Job Description - Primary responsibility includes working closely with external customers who submit 834 membership files. Knowledge of the 834 HIPAA compliant file layout is highly desirable. Apply, analyze and manage 834 and membership business rules. Manage phone inquiries from external customers related to 834 customer inquiries. Analyze, process and/or expedite operational membership transactions; this may include timely resolution of problems. Provide leadership team with status of issues. Utilize and maintain available corporate production and reporting systems; produce routine and non-routine reports, letters and communications. Assist personnel (both internal and external) by answering questions and supplying information. Develop and maintain an effective working relationship with customers or partners. Other duties may be assigned. Top 3 Required Skills/Experience - <ul> <li>High proficiency with Microsoft Suite primarily Outlook, Excel, Access, and Teams.</li> <li>Demonstrated skills including organizational (ability to prioritize multiple assignments), analytical (attention to detail), and interpersonal (written and oral, including internal and external contacts) are required.</li> <li>Ability to perform as a self-starter, with motivation to consistently produce high quality results is required. </li> </ul> Required Skills/Experience - <ul> <li>Bachelor's Degree in related field preferred.</li> <li>Strong creative problem-solving skills are required.</li> <li>Demonstrated flexibility, self-discipline and ability to work independently, as well as within a group is required.</li> <li>Ability to make decisions within scope of responsibility where operational guidelines/procedures are non-existent.</li> <li>Other related skills and/or abilities may be required to perform this job.</li> </ul> Preferred Skills/Experience - <ul> <li>Minimum of 2-5 years of Healthcare enrollment experience preferred.</li> <li>Working knowledge of BCN operating systems/applications considered a plus (Facets, EOS, Macess).</li> <li>Knowledge of the 834 HIPAA compliant file layout is highly desirable.</li> </ul> Job ID: JOB-238574 Publish Date: 18 Oct 2024

STRATEGIC STAFFING SOLUTIONS HAS AN OPENING!Strategic Staffing Solutions is currently looking for an Data Engineer for a contract opening with one of our largest clients!This is a Contract Opportunity with our company that MUST be worked on a W2 ONLY, NO visa sponsorship or C2C eligibility for this position. The details are below. Beware of scams. S3 never asks for money during its onboarding process.Job Title: Data EngineerContract: 24 Months Location: Minneapolis, MNJob/Role Description: Consult as an expert to develop or influence initiatives and resources for highly complex business and technical needs across Engineering.Consult on the strategy and resolution of highly complex and unique challenges requiring in-depth evaluation across multiple areas, delivering solutions that are long-term, large-scale and require vision, creativity, innovation, and advanced analytical and inductive thinking.Provide expertise to client senior leadership on innovative Engineering business solutions.Strategically engage with client personnel. Required Skills/Experience: 7+ years of Engineering experience, or equivalent demonstrated through one or a combination of the following: work or consulting experience, training, military experience, education. Coaching Skillset, Infrastructure background preferred, Github, CICD, Ansible How to Apply: send resume and contact information to Nick Gleason, Sourcing Specialist, at ngleason@strategicstaff.com .The S3 Difference:The global mission of S3 is to build trusting relationships and deliver solutions that positively impact our customers, our consultants, and our communities. The four pillars of our company are to: Set the bar high for what a company should do Create jobs Offer people an opportunity to succeed and change their station in life Improve the communities where we live and work through volunteering and charitable giving As an S3 employee, youre eligible for a full benefits package that may include: Medical Insurance Dental Insurance Vision Insurance 401(k) Plan Vacation Package Life & Disability Insurance Plans Flexible Spending Accounts Tuition Reimbursement

Job Title: Digital Product Manager - Hiring FAST!Location: Dallas, TX Pay Rate: $49/HR on W2 Only - NO C2C Setting: Onsite Required (Hybrid/Remote is NOT an Option) Duration: 6+ months. ***WE DO VISA TRANSFERS*** Required Qualifications: <ul> <li>Experience working with vendors</li> <li>Experience monitoring and meeting deadlines and maintaining budget</li> <li>Experience in agile product management.</li> <li>Bachelor s degree.</li> </ul>Responsibilities:<ul> <li>Oversee MVP product development through go to market stages</li> <li>Work with engineering counterparts to attend and monitor all sprint ceremonies and ensure product development stays on track</li> <li>Facilitate product reviews to ensure compliance with stakeholder requirements, including but not limited to legal, privacy, compliance</li> <li>Ability to write and prioritize product requirements</li> <li>Test product releases to ensure quality of work and user experience expectations</li> <li>Own the post-launch product roadmap, including developing a prioritized backlog of product enhancements.</li> </ul> Job ID: JOB-238393 Publish Date: 09 Oct 2024

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