When analyzing a scatter plot of advertising spend vs. revenue in a GMAT data interpretation question, what does a correlation coefficient of -0.1 indicate? (difficulty: medium)
When analyzing a database containing multi-valued attributes in customer contact information, which normalization form specifically addresses this issue? (difficulty: medium)
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 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)