statistic HW

Use Minitab for all questions.
Question #12-44
a) b) c) d) e)
Add one extra question
f) Fit the model using all the regressors plus two new variables SOAKTIME×SOAKPCT and DIFFTIME×DIFFPCT
and use general regression test (F test) to test whether the contribution of the two new variables are significant.
Question# 12-56
Question#12-81
do not forget to use minicab for all question
