Consider again the relationship between the sales and profits of Fortune 500 companies that you analyzed in Exercise 48.
In Exercise 48

a) Find a 95% confidence interval for the slope of the regression line. Interpret your interval in context.
b) Last year, the drug manufacturer Eli Lilly, Inc., reported gross sales of $23 billion (that's $23,000 million). Create a 95% prediction interval for the company's profits, and interpret your interval in context.

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Dependent variable is Profits R-squared-:66.2% Profits Sales 79 Count 79 Mean 209.839 4178.29 Variable Coefficient SE(Coeff) Variance 635,172 49,163,000 Intercept 176.644 61.16 Std Dev 796.977 7011.63 Sales 0.092498 0.0075 s-. 466.2