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Homework 5

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Do the following problems from the textbook (see notes below!):

6.2 6.5(abd) 6.6(ab) 6.7(a) 6.8

6.18(ce) 6.19(ac) 6.22(a c) 6.23(a)

3.3(cd) 3.6(bc) 3.16(a c d e f).

NOTE: Problems 6.5 6.6 6.7 6.8 6.18 6.19

3.3 3.3 and 3.16 require analysis using a

computer package such as SAS or R.

NOTE: For 6.5(a) use pairs(brand) and cor(brand) in R

NOTE: For 6.5(d) and 6.18(e) you only need to do the

residual plot of the residuals against the predicted

values Y-hat (i.e. the type of plot we did an

example of in class). You may optionally do the plots

of the residuals against the other terms the book

mentions.

NOTE: For 6.8 interpret both the confidence interval and the prediction interval.

NOTE: For 6.23(a) will be counted as a 5 point bonus added to Exam 1. Do NOT use any resources but your notes and the textbook.

NOTE: For 3.16(c) note that the function for base-10

logarithms is log10( ) both in SAS and in R.

The Brand Preference Commercial Properties

and Solution Concentration data sets are

given on D2L.

Please write your answers neatly and clearly!

See the attached file for questions and data details.

Thanks