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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.

What factors could have biased this result, and what would you look into?

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

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?

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 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

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We are looking for a Senior Business Analyst to join our Database Marketing team. The ideal candidate will have a proven track record of creating data cubes via SQL and building comprehensive Tableau dashboards based on business requirements. This role utilizes a candidate's strong technical background and ability to work on ad-hoc projects as needed. What our Senior Business Analysts on our Database Marketing team enjoy: <ul><li> Creating, managing, and optimizing data cubes using SQL to support various business needs. </li><li> Using their analytical, problem-solving, and critical-thinking skills to develop and maintain interactive Tableau dashboards in order to provide actionable insights for stakeholders. </li><li> Collaborating with business stakeholders to understand their requirements and translating them into technical specifications. </li><li> Utilizing their ability to explain complex data insights to non-technical stakeholders. </li><li> Performing ad-hoc data analysis and reporting as needed to support business initiatives. </li><li> Working independently and managing multiple projects simultaneously. </li><li> Ensuring data integrity, consistency, and accuracy in all reporting and analysis. </li><li> Continuously seeking opportunities to improve data processes, reporting capabilities, and analytical methodologies. </li><li> Working as part of a team while also being able to work independently. </li> </ul>MAJOR DUTIES AND RESPONSIBILITIES <ul><li> Work with business stakeholders analyze business operations and recommend solutions to align individual business functions with organizational goals </li><li> Understand the structure, policies, and operations of an organization, and recommend solutions to improve general business processes and planning </li><li> Compile, analyze, interpret, and present complex data related to current and future operation </li><li> Create reports, charts, graphs and presentations to aid in proposing new strategies for successful business changes </li><li> Develop project estimates by identifying phases and elements, personnel requirements, and costs </li><li> Analyze external market dynamics and other data sources to assess trends and develop actionable insights and recommendations to management, via understanding of the business model and the information available for analysis </li><li> May make recommendations for solutions or improvements that can be accomplished through new technology or alternative uses of existing technology </li><li> Perform other duties as requested </li> </ul>REQUIRED QUALIFICATIONS Required Skills/Abilities and Knowledge <ul><li> Ability to read, write, speak and understand English\\Ability to prioritize and organize effectively </li><li> Ability to work independently, as well as in a collaborative and dynamic team environment </li><li> Ability to handle multiple projects and priorities </li><li> Ability to analyze and interpret data </li><li> Ability to quickly identify business problems/opportunities </li><li> Ability to communicate orally and in writing in a clear and straightforward manner </li><li> Ability to communicate with all levels of management and company personnel </li><li> Ability to manage multiple projects at one time </li><li> Ability to prioritize and organize effectively </li><li> Superb knowledge of software applications such as Word, Excel, etc. </li> </ul>Required Education Bachelor's degree or equivalent combination of education and experience Required Related Work Experience and Number of Years Business analysis or related experience - 5+ Preferred Education and Experience <ul><li> Bachelor's degree in Business, Marketing, Data Science, Computer Science, or a related field. </li><li> 5 years of experience in SQL and Tableau. </li><li> Strong technical skills and proficiency in creating complex SQL queries and data cubes. </li><li> Extensive experience in building and designing Tableau dashboards. </li><li> Excellent analytical, problem-solving, and critical-thinking skills. </li><li> Ability to translate business requirements into technical specifications. </li><li> Strong communication skills, with the ability to explain complex data insights to non-technical stakeholders. </li><li> Ability to work independently and manage multiple projects simultaneously. </li><li> Experience in Database Marketing or a related field. </li><li> Knowledge of other data visualization tools. </li><li> Familiarity with data warehousing concepts and tools. </li><li> Advanced degree or relevant certifications. </li> </ul> WORKING CONDITIONS Office environment BGN349 2024-37949 2024 Here, employees don't just have jobs, they build careers. That's why we believe in offering a comprehensive pay and benefits package that rewards employees for their contributions to our success, supports all aspects of their well-being, and delivers real value at every stage of life. A qualified applicant's criminal history, if any, will be considered in a manner consistent with applicable laws, including local ordinances. Get to Know Us Charter Communications is known in the United States by our Spectrum brands, including: Spectrum Internet®, TV, Mobile and Voice, Spectrum Networks, Spectrum Enterprise and Spectrum Reach. When you join us, you're joining a strong community of more than 100,000 individuals working together to serve more than 32 million customers in 41 states and keep them connected to what matters most. Watch this video to learn more. Who You Are Matters Here We're committed to growing a workforce that reflects our communities, and providing equal opportunities for employment and advancement. EOE, including disability/vets. Learn about our inclusive culture.

Do you want to use your analytical expertise to align business functions and organizational goals? You can do that. Ready to drive revenue improvements through process redesigns and the integration of new products or services? As a Senior Business Analyst at Spectrum Enterprise, you can do that. Spectrum Enterprise provides modern enterprise technology solutions that meet the unique needs of some of the country's biggest brands. If you're looking to build your most successful career, support client growth and work alongside intelligent, driven professionals, you can do that. We're ready to go all in on your future and create an engaging environment. BE PART OF THE CONNECTION You gather data from multiple sources, analyze complex business operations and provide strategies to simplify and enhance the client experience. You create new or update existing documentation for initiatives and enhancements to systems, tools and processes. You work with several business units and present solutions, requirements and status updates. You collaborate with teams in person and digitally within an office environment. WHAT OUR SENIOR BUSINESS ANALYSTS ENJOY MOST <ul><li> Work with stakeholders to analyze operations and recommend solutions that align business functions with organizational goals. </li><li> Recommend solutions for general business processes and planning based on an in-depth understanding of the company structure, policies and procedures. </li><li> Compile, analyze, interpret and present complex data to propose new strategies for current and future business changes. </li><li> Develop project improvement scopes by identifying phases, elements, personnel requirements and costs. </li><li> Assess trends and develop actionable insights based on an analysis of external market dynamics and other data sources. </li><li> Leverage new technology or alternative uses of existing technology to improve solutions results. </li> </ul> WHAT YOU'LL BRING TO SPECTRUM ENTERPRISE Required Qualifications <ul><li> Experience: Five or more years of business analysis or related experience. </li><li> Education: Bachelor's degree in business or a related field. </li><li> Technical Skills: Proficient in Microsoft Office. </li><li> Skills: Expert in analyzing and interpreting data for multiple projects simultaneously; Prioritization, organizational and English communication skills. </li><li> Abilities: Ability to work independently in a collaborative, dynamic team environment. </li></ul>Preferred Qualifications <ul><li>Experience as a contractor for Spectrum Enterprise. </li></ul> SPECTRUM ENTERPRISE CONNECTS YOU TO MORE <ul><li> Embracing diversity: A culture of excellence that celebrates diversity, innovative thinking and dedication to exceeding client expectations. </li><li> Learning culture: Company support in obtaining technical certifications. </li><li> Dynamic growth: Paid training and clearly defined paths to advance within the company. </li><li> Total rewards: Comprehensive benefits that encourage a work-life balance. </li></ul> Apply now, connect a friend to this opportunity or sign up for job alerts ! BGN349 2024-39183 2024 Here, employees don't just have jobs, they build careers. That's why we believe in offering a comprehensive pay and benefits package that rewards employees for their contributions to our success, supports all aspects of their well-being, and delivers real value at every stage of life. A qualified applicant's criminal history, if any, will be considered in a manner consistent with applicable laws, including local ordinances. This job posting will remain open until 2024-08-30 05:00 AM (UTC) and will be extended if necessary. The pay for this position has a salary range of $78,900.00 to $139,500.00. The actual salary offer will carefully consider a wide range of factors, including your skills, qualifications, experience and location. Also, certain positions are eligible for additional forms of compensation such as bonuses. Get to Know Us Charter Communications is known in the United States by our Spectrum brands, including: Spectrum Internet, TV, Mobile and Voice, Spectrum Networks, Spectrum Enterprise and Spectrum Reach. When you join us, you're joining a strong community of more than 100,000 individuals working together to serve more than 32 million customers in 41 states and keep them connected to what matters most. Watch this video to learn more. Who You Are Matters Here We're committed to growing a workforce that reflects our communities, and providing equal opportunities for employment and advancement. EOE, including disability/vets. Learn about our inclusive culture.

Spectrum's Product and Technology team creates, develops, and operates the nation's fastest mobile service, most reliable internet service, most viewed live TV app, and the most advanced WiFi, serving nearly 100 million users and 500 million devices. We are transforming the next era of connectivity and entertainment experiences. The diversity of experience available within Spectrum's Product and Technology team is unmatched and there are opportunities to grow your career as a designer, architect, engineer, developer, operator, or data scientist. We are creative, disciplined, hard-working, complex-problem solvers that believe in collaborating to deliver the highest quality customer experience. BE PART OF THE CONNECTION As a Senior Business Analyst o n this team, you will be responsible for analyzing complex business operations and recommending solutions to align individual business functions with organizational goals. This role requires thorough understanding of the structure, policies, and operations of an organization, and recommends solutions to improve general business processes and planning. This position can collaborate with one or several business units or functions. WHAT YOU'LL BRING TO SPECTRUM Required Qualifications <ul><li> Experience: Business analysis or related experience - 5+ years </li><li> Education: Bachelor's degree in Business or related field or equivalent experience </li><li> Skills: Superb knowledge of software applications such as Word, Excel, etc. </li> <li> Abilities: <ul><li> Ability to read, write and speak the English language </li><li> Ability to prioritize and organize effectively </li><li> Ability to work independently, as well as in a collaborative and dynamic team environment </li><li> Ability to handle multiple projects and priorities </li><li> Ability to analyze and interpret data </li><li> Ability to quickly identify business problems/opportunities </li><li> Ability to communicate orally and in writing in a clear and straightforward manner </li><li> Ability to communicate with all levels of management and company personnel </li><li> Ability to manage multiple projects at one time </li><li> Ability to prioritize and organize effectively </li> </ul></li><li> Travel Ability: Office environment </li> <li> Schedule: <ul><li> Full time </li> </ul></li> </ul> SPECTRUM CONNECTS YOU TO MORE <ul><li> Innovative Tools & Tech: Work with high-performing software and applications on the forefront of the digital telecommunications industry. </li><li> Dynamic Growth: The growth of our industry and evolving technology will power your career as you move up or around the company. </li><li> Supportive Teams: Who you are matters here. And, we aim to foster an inclusive workplace where every person is empowered to bring their best ideas. </li><li> Total Rewards: See all the ways we invest in you-at work and in life </li></ul> Apply now, connect a friend to this opportunity or sign up for job alerts ! BGN349 2024-38737 2024 Here, employees don't just have jobs, they build careers. That's why we believe in offering a comprehensive pay and benefits package that rewards employees for their contributions to our success, supports all aspects of their well-being, and delivers real value at every stage of life. A qualified applicant's criminal history, if any, will be considered in a manner consistent with applicable laws, including local ordinances. Get to Know Us Charter Communications is known in the United States by our Spectrum brands, including: Spectrum Internet®, TV, Mobile and Voice, Spectrum Networks, Spectrum Enterprise and Spectrum Reach. When you join us, you're joining a strong community of more than 100,000 individuals working together to serve more than 32 million customers in 41 states and keep them connected to what matters most. Watch this video to learn more. Who You Are Matters Here We're committed to growing a workforce that reflects our communities, and providing equal opportunities for employment and advancement. EOE, including disability/vets. Learn about our inclusive culture.

JOB SUMMARY Responsible for architecting and leading data engineering functions including, but not limited to: data extract, transformation, loading, integration in support of enterprise data infrastructures, data warehouse, operational data stores and master data management. Involved in architecting innovative solutions. Subject matter expert for multiple programs/systems. MAJOR DUTIES AND RESPONSIBILITIES <ul><li> Actively and consistently supports all efforts to simplify and enhance the customer experience. </li><li> Lead the implementation of data services and data movement infrastructures. </li><li> Architect data structures/models and data movement infrastructures. </li><li> Lead the implementation programming concepts such as data structures, error handing, data manipulation and I/O processing. </li><li> Re-design jobs based on job failures, including but not limited to error handing, data manipulation and I/O processing. </li><li> Lead the implementation of database concepts and practices including definition and query language. </li><li> Architect the implementation of database concepts and practices including definition and query language. </li><li> Design, implement, monitor, enhance, and troubleshoot requirements and architecture specifications of data warehousing systems and/or processing infrastructure. </li><li> Lead the Insights team to design, implement, and support end-to-end data solutions across multiple platforms, environments, domains, and locations. </li><li> Architect development of ETL processes, programs and solutions as per established standards. </li><li> Monitors and administer automated and manual data integration and ETL jobs to verify execution and measure performance. </li><li> Mentor and guide junior developers, vendors, consultants, and external partners to quickly identify and resolve data integration and ETL job issues. </li><li> Diagnose highly complex issues and evaluates, recommends, and executes the best resolution. </li><li> Influence the overall data insights program. </li><li> Deliver quality results to the data development team. </li><li> Ensure alignment to drive consistency and global solutions. </li> </ul>REQUIRED QUALIFICATIONS Required Skills/Abilities and Knowledge <ul><li> Ability to read, write, speak and understand English </li><li> Extensive experience with building use cases and providing development support to data scientists </li><li> Extensive with building use cases and providing development support to data engineers </li><li> Extensive experience with data lake - all data sources - building out data sets for uses cases </li><li> Extensive experience with building SQL/HIVE databases and tables </li><li> Extensive experience with querying and designing efficient warehousing structures </li><li> Extensive knowledge of data access methods from relational databases using SQL </li><li> Extensive knowledge of and hands on with web services (WSDL Soap, Restful) to access data from various source systems </li><li> Extensive knowledge of FTP/sFTP </li><li> Extensive experience with designing or architecting for highly complex ETL processing and warehousing </li><li> Effective written and verbal communication skills </li><li> Effective analytical and troubleshooting abilities </li> </ul>Required Education Bachelor's degree or equivalent experience Required Related Work Experience and Number of Years <ul><li> ETL experience - 8+ </li><li> Experience with SQL, Shell Script, Python, JSON - 6+ </li><li> Data integration experience - 5 </li><li> Data visualization experience (Tableau, Alterx, Microstrategy) - 5 </li><li> Software engineering experience - 5 </li></ul> PREFERRED QUALIFICATIONS Preferred Education Master's degree, or equivalent experience with design, architecture, and leadership WORKING CONDITIONS Office environment This job posting will remain open until 2024-08-15 08:00 PM (MST) and will be extended if necessary. MPD639 2024-38009 2024 Here, employees don't just have jobs, they build careers. That's why we believe in offering a comprehensive pay and benefits package that rewards employees for their contributions to our success, supports all aspects of their well-being, and delivers real value at every stage of life. A qualified applicant's criminal history, if any, will be considered in a manner consistent with applicable laws, including local ordinances. Get to Know Us Charter Communications is known in the United States by our Spectrum brands, including: Spectrum Internet®, TV, Mobile and Voice, Spectrum Networks, Spectrum Enterprise and Spectrum Reach. When you join us, you're joining a strong community of more than 100,000 individuals working together to serve more than 32 million customers in 41 states and keep them connected to what matters most. Watch this video to learn more. Who You Are Matters Here We're committed to growing a workforce that reflects our communities, and providing equal opportunities for employment and advancement. EOE, including disability/vets. Learn about our inclusive culture.

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