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A manager at a retail store analyzes the relationship between advertising (in $100's) and sales (in...

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.

Math   Statistics-And-Probability   
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