7.3 The same study that produced the seat belt safety data of Table 7.1 also took into account the age of the child involved in a fatal accident. The results for those children wearing no seat belts are shown on the next page. Here, X1 1 if the child did not survive and X2 indicates the age in years.

(An age of zero implies that the child was less

than 1 year old, an age of 1 implies the child was more than 1 year old but not yet 2, and so on.)
a Construct an approximate joint probability distribution for X1 and X2.
b Construct the conditional distribution of X1 for fixed values of X2. Discuss the implications of these results.
c Construct the conditional distribution of X2 for fixed values of X1. Are the implications the same as in part (b)?

Transcribed Image Text:

Age Survivors Survivors Fatalities 0 104 127 1234 165 91 2 267 107 3 277 90 4 316 94