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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?

Statistics

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?

Product Metrics

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?

<h3>Job Description</h3><div>Job Description<div>Company Description For More Open Positions Visit us at: http://recruiting.woongjininc.com/ Our Mission WOONGJIN, Inc. is a rapidly growing team who provides a range of unique, exceptional, and enhanced services to our clients. We have a strong moral code that includes the service of goodness without expectations of reward. We are motivated by the sense of responsibility and servant leadership.Benefits<ul><li>Medical Insurance</li><li>Vision Insurance</li><li>Dental Insurance</li><li>401(k)</li><li>Paid Sick hours</li></ul>Job Description The Logistics Transportation Pricing Analyst is responsible for analyzing current market conditions and economic trends while continuously evaluating the efficiency of surface transportation cost routes. This role requires applying various factors to create an overall cost simulation, enabling the optimization of transportation pricing strategies to ensure cost-effectiveness and efficiency across logistics operations. Transportation Data Analytics:<ul><li>Conduct internal and external transportation data analysis and cost research to support carrier negotiations.</li><li>Simulate scenario-based cost estimations to identify the most optimal transportation solutions.</li></ul>Carrier Negotiations:<ul><li>Negotiate the cost of transporting raw materials and finished goods.</li><li>Coordinate transportation activities, ensuring smooth communication and proper completion of necessary paperwork.</li></ul>RFP Administration:<ul><li>Conduct internal and external RFQ data analysis and cost research for carrier sourcing.</li><li>Obtain quotes from various suppliers and negotiate price, quantity, terms, and conditions with transportation brokers/carriers.</li><li>Identify key factors to aid in price negotiations with carriers during the RFP process.</li></ul>Contract Administration:<ul><li>Collaborate with the legal team to ensure compliance with all business-related conditions in transportation contracts.</li><li>Oversee the company’s internal procurement system throughout the sourcing process.</li></ul>Supplier Evaluation and Comparison:<ul><li>Evaluate suppliers’ quotes and provide detailed assessments of cost element breakdowns.</li><li>Maintain quote comparisons with financial simulations and offer data-driven recommendations for selecting freight forwarders and carriers</li></ul>Salary: $30 - $33/hr. (DOE)Qualifications <ul><li>Bachelor's degree in Accounting, Finance, Supply Chain Management, Economics, Industrial Engineering or related field.</li><li>Minimum of 3 years of experience as a Logistics Analyst or in a similar role, with proven expertise and progressively increasing responsibilities.</li><li>Proficiency in Microsoft Access and Excel, with the ability to manipulate large datasets and create complex reports.</li><li>Strong analytical skills, with the ability to interpret data and provide actionable insights to improve logistics operations.</li><li>Excellent written and verbal communication skills, with the ability to effectively convey complex information to stakeholders at all levels.</li><li>Comfortable working with tables, charts, and numbers to present findings and recommendations.</li><li>Ability to thrive in a fast-paced environment and manage multiple priorities effectively.</li><li>Strong collaboration and interpersonal skills, with the ability to work effectively in cross-functional teams.</li><li>Willingness to work additional hours outside of regularly scheduled business hours, including weekends and holidays, to meet business needs.</li><li>Excellent reporting skills are required to present reports to management or clients on bidding plans and results.</li><li>Bilingual (English/Korean)</li></ul> Additional Information All your information will be kept confidential according to EEO guidelines. *** NO C2C ***</div></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Decreasing Comments	Product Metrics	Easy	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High

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