Problem 10.4 The following data represent the number of disk I/Os (input-output) and CPU times for seven programs. Disk I/Os: 14, 16, 27, 42, 39, 50, 83 CPU times: 2, 5, 7, 9, 10, 13, 20 (Source: R. Jain (1991), The Art of Computer Systems Performance Analysis, John Wiley & Sons, New York. Used with permission.)

(a) Draw the scatter plot for the regression Model (Y = CPU time|X = Disk I/Os).

(b) Calculate the least squares estimates βˆ0 and βˆ1 and draw the graph of the estimated regression line y = βˆ0 + βˆ1x. Use the same axes on which you graphed the scatter plot.

(c) Compute the sample correlation, coefficient of determination, and error sum of squares.

(d) Compute the predicted values, the residuals, and display the results in a format similar to that of Table 10.3. Save your computations.