The following data set refers to Stanford heart transplants. It relates the survival time of patients after receiving a heart transplant to their age and to a mismatch score that is used as an indicator of how well the transplanted heart should match the recipient.
Survival time (days)
Mismatch Score
Age
624
1.32
51.0
1350
0.87
54.1
64
1.89
54.6
46
0.61
42.5
1024
1.13
43.4
280
1.12
49.5
10
2.76
55.3
60
0.69
64.5
836
1.58
45.0
136
1.62
52.0
730
0.96
58.4
39
1.38
42.8
(a) Fit a multiple linear regression model to these data.
(b) Estimate the survival time of a 50-year-old heart transplant patient whose mismatch score is 1.46.
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