Chirping Crickets Refer to Exercise 12.23, in which the number of chirps per second...

Chirping Crickets Refer to Exercise 12.23, in which the number of chirps per second for a cricket was recorded at 10 different temperatures. Use the MINITAB diagnostic plots to comment on the validity of the regression assumptions.

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What diagnostic plot can you use to determine whether the assumption of equal variance has been violated? What should the plot look like when the variances are equal for all values of x?