A research chemist wants to understand how several predictors are associated with the wrinkle
resistance of cotton cloth. The chemist examines 32 pieces of cotton cellulose produced at
different settings of curing time, curing temperature, formaldehyde concentration, and catalyst
ratio. The durable press rating, Rating as a measure of wrinkle resistance, is recorded for each
piece of cotton.
Observations are as follows:
Concentration
Ratio
Temp
Time
Random
Rating
8
4
100
1
0.199357
5.4
2
4
180
7
0.240903
2.25
7
4
180
1
0.255141
1.6
10
7
120
5
0.140835
1.9
7
4
180
5
0.503855
1.6
7
7
180
1
0.202425
1.75
7
13
140
1
0.189619
1.6
5
4
160
7
0.011733
2.5
4
7
140
3
0.436062
1.8
5
1
100
7
0.342106
5.4
8
10
140
3
0.321477
1.7
2
4
100
3
0.138477
5.6
4
10
180
3
0.435399
1.5
6
7
120
7
0.437447
3.7
10
13
180
3
0.513989
1.8
4
10
160
5
0.353253
2.5
4
13
100
7
0.303601
1.3
10
10
120
7
0.148996
1.9
5
4
100
1
0.295393
4.5
8
13
140
1
0.357123
1.6
10
1
180
1
0.275052
2.6
2
13
140
1
0.610607
3.1
6
13
180
7
0.364033
1.7
7
1
120
7
0.34444
2.5
5
13
140
1
0.592747
1.5
8
1
160
7
0.219902
2
4
1
180
7
0.193678
5.8
6
1
160
1
0.12843
5.5
4
1
100
1
0.215612
5.3
7
10
100
7
0.118933
1.6
4
1
100
1
0.353881
5.4
4
1
100
1
0.139778
5.45
The data was used in the Minitab to generate the scatter matrix plot by following the procedure:
