Question: 2.6 For the regression model for the wire bond pull strength data in Exercise 2.4: (a) Plot the residuals versus y and versus the regressors

2.6 For the regression model for the wire bond pull strength data in Exercise 2.4:

(a) Plot the residuals versus y and versus the regressors used in the model. What information is provided by these plots?

(b) Construct a normal probability plot of the residuals. Are there reasons to doubt the normality assumption for this model?

(c) Are there any indications of influential observations in the data?

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