Problem 8.50

(a) Refer to the radiation data of Table 1.3. The histogram (Figure 1.10) suggests that these data are not normally distributed. Construct a Q–Q plot of the data and use it as an heuristic tool to assess the plausibility of the hypothesis of normality.

(b) Test the data for normality by applying the Shapiro–Wilk test. State the alternatives, decision rule, and conclusion. What is the P-value of the test?