A manager at a retail store analyzes the relationship between advertising (in $100's) and sales (in $1000's) by reviewing the store's data for the previous six months. (please show step by step work)
Advertising ($100's) | Sales ($1,000's) |
20 | 15 |
25 | 18 |
30 | 20 |
22 | 16 |
27 | 19 |
26 | 20 |
A) Calculate the mean of advertising and the mean of sales
B ) Calculate the standard deviation of advertising and the standard deviation of sales
C) Calculate and interpret the covariance between advertising and sales.
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