Question: Suppose there is an investigation into the relationship between taking aspirin and risk of heart attack. Suppose 105 of the 11,038 aspirin takers had

risk of heart attack. Suppose 105 of the 11,038 aspirin takers had

Suppose there is an investigation into the relationship between taking aspirin and risk of heart attack. Suppose 105 of the 11,038 aspirin takers had heart attacks, whereas 186 of the 11,031 placebo takers had them. The hypotheses for this example are given below. Null Hypothesis: There is no relationship between taking aspirin and risk of heart attack in the population. Alternative hypothesis: There is a relationship between taking aspirin and risk of heart attack in the population. Calculate the expected counts. (Round your answers to two decimal places.) (a) (c) Aspirin Placebo Total Yes 291 21,778 Total 11,038 11,031 22,069 Calculate the value of the chi-square statistic. (Round pour answer to two decimal places.) Make a conclusion using a level of 0.01. State the conclusion in the context of this situation. is than the cutoff of 6.63 required for a level of 0.01, so the relationship statistically significant. We can conclude that there a relationship between taking aspirin and risk of a heart The chi-square statistic of attack in the population.

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