Answer to Question #345512 in Statistics and Probability for JohnMark

Question

SJS Company has been selling to retail customers in the Metro Manila area. They advertise

extensively on radio, print ads, and in the internet. The owner would like to review the

relationship between the amount spent on advertising expense ( in 1000s) and sales (in ₱000s).

Below is information on advertising expense and sales for the last 9 months.

Month Jan Feb Mar Apr May Jun Jul Aug Sept

Advertising

Expense 10 14 12 9 13 15 8 13 16

Sales

Revenue 180 170 190 220 235 208 215 175 250

Determine the coefficient of correlation and test the significance at 0.05.

Answer 1

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