In decision tree analysis, which of the following metrics is most appropriate for evaluating the quality of a split when dealing with continuous target variables? (difficulty: medium)
A company's revenue grows by 20% while its profit margin decreases by 5 percentage points. If initial revenue was $1,000,000 with a 25% profit margin, what is the new profit amount? (difficulty: hard)
In funnel analysis for an e-commerce website, if the conversion rate from cart to purchase is 25% and 1000 users add items to cart, how many purchases would be expected? (difficulty: easy)
When analyzing a box plot in GMAT data interpretation, if the lower quartile is 20, median is 25, and upper quartile is 40, what does this tell us about the data's distribution? (difficulty: hard)