Chapter 2, Problem 9E

a.

Explanation of Solution

Predictors

• Name is qualitative, the rest are quantitative.
• However, looking at summary(), it is notic...

b.

Explanation of Solution

Range of predictor

• The range of each quantitative pred...

c.

Explanation of Solution

Mean and standard deviation of predictor

• Using signif() function, it can be round to two significant digits...

d.

Explanation of Solution

Range,median and standard deviation of predictor

• Using round() function, it rounds to two decimal places rather than two significant digits...

e.

Explanation of Solution

Simple linear regression

• It is easy to see that if xi is replac...

f.

Explanation of Solution

Predictors

• After plotting predictors graphically, it will be

  library(pheatmap)

  pheatmap(t(scale(as...