A simple linear regression model was used to describe the relationship between sales revenue y (in thousands
Question:
a. What proportion of observed variation in sales revenue can be attributed to the linear relationship between revenue and advertising expenditure?
b. Calculate se and sb.
c. Obtain a 90% confidence interval for b, the average change in revenue associated with a $1000 (that is, 1-unit) increase in advertising expenditure.
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Related Book For
Statistics The Exploration & Analysis Of Data
ISBN: 9780840058010
7th Edition
Authors: Roxy Peck, Jay L. Devore
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