An AB test tells us if:

You are conducting an A/B test to evaluate the effectiveness of two different landing page designs for a website. Visitors to the site are randomly assigned to either version A or version B of the landing page. The primary metric for success is the conversion rate, or the percentage of visitors who take a desired action on the page. After collecting data for a month, you analyze the results to determine which version performed better. Which of the following statements is true regarding the analysis of an A/B test?

1 gallon is how many quarts?

A university administrator notices that first-year students’ average GPA has declined compared to the previous year. Concerned about potential academic challenges, the administrator wants to investigate further. What additional questions would you ask to explore this issue further (i.e., drill down)? What types of data or analyses might help you identify possible causes?

A retail website is testing two homepage designs to improve user sign-up rates. Version A features a standard product layout, while Version B highlights customer testimonials. Define a clear null hypothesis and alternative hypothesis for this A/B test. Identify the independent variable and the dependent variable. What is an extraneous variable in this scenario and how would you address these? How will you decide which version to use?

1 teaspoon (tsp) = how many milliliters (mL)?

1 liter (L) is how many milliliters (mL)? 

In the lecture, Andrew talked about how he reshaped the direct marketing activities on Ensure to increase the ROI (return on investment) by +51%. What enabled this strong performance?

In the clip below, does the thrombus appear to be acute or chronic?

Which set of code produces the following figure?