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<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?

Statistics

<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?

<p>In an A/B test, how can you check if assignment to the various buckets was truly random?</p>


<p>In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?</p>

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

A/B Testing & Experimentation

<div><h2>E T Consultant - Risk Analyst Financial Sustainability</h2><p>Build a career with impact. Working at the World Bank Group (WBG) provides a unique opportunity to help countries solve their greatest development challenges. As one of the largest sources of funding and knowledge for developing countries, the WBG is a unique partnership of five global institutions dedicated to ending poverty, increasing shared prosperity, and promoting sustainable development. With 189 member countries and more than 120 offices worldwide, the WBG works with public and private sector partners, investing in groundbreaking projects and using data, research, and technology to develop solutions to the most urgent global challenges.</p><p>The International Finance Corporation (IFC), a member of the World Bank Group, is the largest global development institution focused on the private sector in emerging markets. We work in more than 100 countries, using our capital, expertise, and influence to create markets and opportunities in developing countries. In fiscal year 2025, IFC committed a record $71.7 billion to private companies and financial institutions in developing countries, leveraging private sector solutions, and mobilizing private capital to create a world free of poverty on a livable planet.</p><p>Within IFC, the Corporate Risk Management Department (CRM) is responsible for risk management at a corporate level: this includes Capital Management and Enterprise Risk, Operational Risk and Treasury Risk. CRM's measures the current and projected risks in IFC's investment portfolio to ensure IFC's ongoing financial sustainability. Doing so, the team utilizes a variety of integrated risk models, such as for economic capital, financial and capital forecasting, stress testing or risk-adjusted performance measurement, to develop and maintain IFC's risk management policies.</p><p>CRM's Financial Sustainability Team is conducting a search for an Extended-Term Consultant (ETC) to support its work on the enhancement and maintenance of CRM's financial and capital forecasting model, extensive data analysis of IFC's investment portfolio, rating agency requests and any ad-hoc requests from Senior Management relevant to IFC's financial sustainability. The position term will be a period of 12 months, and could be extended.</p><p>Role & Responsibilities:</p><p>The successful candidate will support CRM's Financial Sustainability team in:</p><ul><li>The collection and analysis of risk-relevant portfolio data from IFC's source systems for various analysis and forecasting purposes.</li><li>The collection, preparation and documentation of data for rating agency data templates;</li><li>Configuring and running the Forecasting Model, reporting and analyzing model outputs under different scenarios and assumptions, performing change impact analysis across scenarios;</li><li>The collection and analysis of financial data for IFC and other Multilateral Development Banks (MDBs) and Commercial Banks to perform peer comparison and benchmarking analysis;</li><li>The interaction with other departments to obtain and analyze risk-relevant and financial information (such as the Controller's or IT Departments) on a timely matter.</li><li>Supporting the collection and analysis of data and credit risk analytics to support the GEMs data collection effort.</li></ul><p>Selection Criteria:</p><p> A Master's degree in Finance, Business Administration, Economics, Mathematics (or equivalent quantitative skills);</p><p> 2 years of work experience in finance or risk management is preferred;</p><p> Experience of analyzing large data sets and financial statement analysis with critical and independent thinking;</p><p> Experience in data manipulation and extraction using SQL (and Python);</p><p> General knowledge of financial markets and investment products;</p><p> Experience in building financial models is considered a strong plus;</p><p> Knowledge of IFC's financial statements, internal financial and risk-relevant data systems (ODS, IRP, SAP, etc.) is considered a plus;</p><p> A strong work ethic and a solid team player to work in the international and multicultural work environment within CRM and across the IFC;</p><p> Organizational skills and the ability to multitask, meet tight deadlines and work efficiently in multicultural teams;</p><p> Strong interpersonal skills, analytics skills, attention to detail and resourcefulness.</p><p>WBG Culture Attributes:</p><p>1. Sense of urgency: Anticipate and quickly respond to the needs of internal and external stakeholders.</p><p>2. Thoughtful risk-taking: Challenge the status quo and push boundaries to achieve greater impact.</p><p>3. Empowerment and accountability: Empower yourself and others to act and hold each other accountable for results.</p><p>We are proud to be an equal opportunity and inclusive employer with a dedicated and committed workforce, and do not discriminate based on gender, gender identity, religion, race, ethnicity, sexual orientation, or disability.</p><p>Learn more about working at the World Bank and IFC, including our values and inspiring stories.</p><p>Note: The selected candidate will be offered a one-year appointment, renewable at the discretion of the World Bank Group, and subject to a lifetime maximum ET appointment of three years. If an ET appointment ends before a full year, it is considered as a full year toward the lifetime maximum. Former and current ET staff who have completed all or any portion of their third-year ET appointment are not eligible for future ET appointments.</p></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

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