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The data set is described in the Appendix of the text. Here I reproduce a page of pair-wise scatter plots for all variables except the categorical variables Region and School.

It is evident from the plot that, as expected, several of the variables are quite highly correlated. Here is the correlation matrix:

Stay Age Risk Culture Chest Beds Census Nurses Facilities

Stay 1.00 0.19 0.53 0.33 0.38 -0.49 0.47 0.34 0.36

Age 0.19 1.00 0.00 -0.23 -0.02 -0.02 -0.05 -0.08 -0.04

Risk 0.53 0.00 1.00 0.56 0.45 -0.19 0.38 0.39 0.41

Culture 0.33 -0.23 0.56 1.00 0.42 -0.31 0.14 0.20 0.19

Chest 0.38 -0.02 0.45 0.42 1.00 -0.30 0.06 0.08 0.11

Beds 0.41 -0.06 0.36 0.14 0.05 -0.11 0.98 0.92 0.79

Census 0.47 -0.05 0.38 0.14 0.06 -0.15 1.00 0.91 0.78

Nurses 0.34 -0.08 0.39 0.20 0.08 -0.11 0.91 1.00 0.78

Facilities 0.36 -0.04 0.41 0.19 0.11 -0.21 0.78 0.78 1.00

	Stay	Age	Risk	Culture	Chest	Beds	Census	Nurses	Facilities
Stay	1.00	0.19	0.53	0.33	0.38	-0.49	0.47	0.34	0.36
Age	0.19	1.00	0.00	-0.23	-0.02	-0.02	-0.05	-0.08	-0.04
Risk	0.53	0.00	1.00	0.56	0.45	-0.19	0.38	0.39	0.41
Culture	0.33	-0.23	0.56	1.00	0.42	-0.31	0.14	0.20	0.19
Chest	0.38	-0.02	0.45	0.42	1.00	-0.30	0.06	0.08	0.11
Beds	0.41	-0.06	0.36	0.14	0.05	-0.11	0.98	0.92	0.79
Census	0.47	-0.05	0.38	0.14	0.06	-0.15	1.00	0.91	0.78
Nurses	0.34	-0.08	0.39	0.20	0.08	-0.11	0.91	1.00	0.78
Facilities	0.36	-0.04	0.41	0.19	0.11	-0.21	0.78	0.78	1.00