Suppose a researcher examined a relationship between taking aspirin every day (yes/no) and the incidence of a heart attack (yes/no).The sample data showed that those taking aspirin had a lower chance of incidence of heart attack.A chi-square test on the data collected resulted in a p-value less than 0.0001.The data were collected in a well-designed randomized experiment.Which of the following conclusions is appropriate?
A)The probability that there is a relationship between the two variables is more than 99.99%.
B)For this population, taking aspirin reduces the risk of heart attack.
C)Heart attacks happened much more often for the non-aspirin takers than the aspirin takers.
D)All of the above conclusions are appropriate.

Question

Quizplus · Accepted Answer

The appropriate conclusion is that for this population, taking aspirin reduces the risk of heart attack. This conclusion is supported by the significant p-value obtained from the chi-square test, and by the fact that the data were collected in a well-designed randomized experiment. It is not appropriate to draw conclusions about specific probabilities or to make comparisons between the two groups based on the information given.

Suppose a Researcher Examined a Relationship Between Taking Aspirin Every