Question

In: Statistics and Probability

The following set of data shows how the advertising budget affects its sales (both in millions...

The following set of data shows how the advertising budget affects its sales (both in millions of dollars):

Advertising. Sales

12.5 148
3.7 55
21.6 338
60 994
37.6 541
6.1 89
16.8 126
41.2 379

Develop the equation of the simple regression line to predict sales from advertising expenditures using these data. You will need to:

-Calculate the intercept and slope of the linear regression formula that relates the advertising to sales.

-Calculate the value of R-squared.

-Predict the sales, in millions of dollars, if the advertising budget is 50, 70, 90 million dollars.

-How strong is the correlation? What is your confidence in the numbers you calculated?

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