7 Suppose that a researcher wishes to test the hypothesis th

7. Suppose that a researcher wishes to test the hypothesis that the proportion of persons in a population who currently use a herbal supplement is .20. To this end, the researcher samples 100 subjects from the population and discovers that 25 of them use the supplement. Assume the alternative hypothesis of interest states that the proportion of persons using the supplement is greater than .20. Which of the following is the appropriate test statistic? A Z test A t test with 99 degrees of freedom A t test with infinite degrees of freedom Relative risk

Solution

It is  Z test, & the proportion rate of sample is = 25/100 = 0.25