Question: Suppose John decides to draw a straight line through his scatter diagram freehand so that it fits well and then extends this line into the

Suppose John decides to draw a straight line through his scatter diagram freehand so that it fits well and then extends this line into the future, using points along the line as his monthly forecasts. How accurate do you think these forecasts will be? Use the standard deviation values John calculated in answering this question. Based on your analysis. would you encourage John to continue searching for a more accurate forecasting method? John has the latest version of Minitab on his computer. Do you think he should use the regression analysis feature of Minitab to calculate a least squares line? If he did. what X variable should be used to forecast monthly sales (Y)?

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