solve

Suppose you obtain the following residual plot between two continuous X variables on the response, process time (N=162). Which of the following multiple linear regression model assumptions would you be most concerned with violating? Residual Plots for Y Normal Probability Plot Versus Fits 99 9 10 99 90 Percent Residual -5 10 -10 -5 10 20 40 60 80 Residual Fitted Value Histogram Versus Order 10 5 Residual Frequency 0 10 -5 -10 0 8 10 20 30 40 50 60 70 80 Residual Observation Order O a. Independence Assumption O b. Normality Assumption O c. Constant Variance Assumption O d. Lack of sufficient sample size Assumption