Refer to Example 13.1, investigating the relationship between taking aspirin and risk of heart attack. As shown in Table 12.1 on page 248, 104 of the 11,037 aspirin takers had heart attacks, whereas 189 of the 11,034 placebo takers had them. The hypotheses for this example are already given in this chapter.
a. Calculate the expected counts.
b. Calculate the value of the chi-square statistic.
c. Make a conclusion using a level of 0.01. State the conclusion in the context of this situation.