# Question

Repeat problem 10–57 for the data of problem 10–17.

In problem Recently, research efforts have focused on the problem of predicting a manufacturer’s market share by using information on the quality of its product. Suppose that the following data are available on market share, in percentage (Y), and product quality, on a scale of 0 to 100, determined by an objective evaluation procedure (X):

X: 27 39 73 66 33 43 47 55 60 68 70 75 82

Y: 2 3 10 9 4 6 5 8 7 9 10 13 12

In problem Recently, research efforts have focused on the problem of predicting a manufacturer’s market share by using information on the quality of its product. Suppose that the following data are available on market share, in percentage (Y), and product quality, on a scale of 0 to 100, determined by an objective evaluation procedure (X):

X: 27 39 73 66 33 43 47 55 60 68 70 75 82

Y: 2 3 10 9 4 6 5 8 7 9 10 13 12

## Answer to relevant Questions

In a regression, the F statistic value is 6.3. Assume the sample size used was n = 104, and conduct an F test for the existence of a linear relationship between the two variables. Repeat problem 10–66 for the regression of problem. Produce residual plots for the regression of problem. Is there any apparent model inadequacy? In problem For problem 10–16, give a 95% prediction interval for the present value when the model is from the 2000s. In problem Explain the advantages of the least-squares procedure for fitting lines to data. Explain how the procedure works. Discuss the relative merits and limitations of the four variable selection methods described in this section.Post your question

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