A retail data analysis shows that shelf space allocated to Product X generates $100 per square foot, while Product Y generates $80 per square foot. If 100 square feet must be allocated between these products, what is the opportunity cost per square foot of allocating space to Product Y? (difficulty: medium)
A company's sales data has a mean absolute percentage error (MAPE) of 15% using simple exponential smoothing and 8% using double exponential smoothing. What can be concluded about the nature of the data? (difficulty: hard)
A company's revenue increased from $2M to $3.5M over a 5-year period. What was the annual simple growth rate and how does it compare to the CAGR? (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)