# Question: Refer to Exercise Two MINITAB residual plots for the simple

Refer to Exercise. Two MINITAB residual plots for the simple linear regression model are shown below.

a. Which graph should be used to check for normal errors? Does the assumption of normality appear to be satisfied?

b. Which graph should be used to check for unequal error variances? Does the assumption of equal variances appear to be satisfied?

a. Which graph should be used to check for normal errors? Does the assumption of normality appear to be satisfied?

b. Which graph should be used to check for unequal error variances? Does the assumption of equal variances appear to be satisfied?

## Answer to relevant Questions

Refer to the National Semiconductor study of manufactured silicon wafer integrated circuit chips, Exercise. Recall that the failure times of the microchips (in hours) were determined at different solder temperatures (degrees ...Suppose you used MINITAB to fit the model y = β0 + β1x1 + β2x2 + ε To n = 15 data points and you obtained the printout below. a. What is the least squares prediction equation? b. Find R2 and interpret its value. c. Is ...Fluorocarbon plasmas are used in the production of semiconductor materials. In the Journal of Applied Physics (Dec. 1, 2000), electrical engineers at Nagoya University (Japan) studied the kinetics of fluorocarbon plasmas in ...A multinomial experiment with k = 3 cells and n = 320 produced the data shown in the accompanying table. Do these data provide sufficient evidence to contradict the null hypothesis that p1 = .25, p2 = .25, and p3 = .50? ...Refer to Exercise. Convert the responses to percent ages by calculating the percentage of each B class total falling into each A classification. Also, calculate the percentage of the total number of responses that constitute ...Post your question