The file S12_69.xlsx contains net sales (in millions of dollars) for Procter & Gamble.
a. Use these data to predict Procter & Gamble net sales for each of the next two years. You need consider only a linear and exponential trend, but you should justify the equation you choose.
b. Use your answer from part a to explain how your predictions of Procter & Gamble net sales increase from year to year.
c. Are there any outliers?
d. You can be approximately 95% sure that Procter & Gamble net sales in the year following next year will be between what two values?