A Manager Of A Local Retail Store Analyzes The Relationship Between Advertising And Sales By Reviewing The Store S Data 1 (81.04 KiB) Viewed 106 times
A manager of a local retail store analyzes the relationship between advertising and sales by reviewing the store's data for the previous six months. Advertising (in $1005) 20 25 30 22 27 26 Sales (in $1,000s) 15 18 20 16 19 20 Click here for the Excel Data File a. Calculate the mean of advertising and the mean of sales. (Round your answers to 2 decimal places.) Mean Advertising Sales b. Calculate the standard deviation of advertising and the standard deviation of sales. (Round your answers to 2 decimal places.) Standard Deviation Advertising Sales C-1. Calculate the covariance between advertising and sales. (Round your answer to 2 decimal places.) Covariance
c-2. Interpret the covariance between advertising and sales. No correlation Positive correlation Negative correlation d. Calculate the correlation coefficient between advertising and sales. (Round your answer to 2 decimal places.) Correlation coefficient
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