Chapter 8, Problem 7SE

Heart Attack Prevention A new drug is being tested to see whether it can reduce the chance of heart attack in people who have previously had a heart attack. The rate of heart attack in the population of concern is 0.20. The null hypothesis is that p (the population proportion using the new drug that have a heart attack) is 0.2.

Pick the correct alternative hypothesis.

$\text{i}\text{. }p\ne 0.2 \text{ ii}\text{. }p>0.2 \text{iii}.p<0.2$