A study is being conducted to determine whether babies born to mothers who have used invitro fertilization (IVF) have a higher rate of infant reflux than the 13% rate for babies born to women who have not used IVF. The study involves a random sample of 500 babies whose mothers used IVF. You are to set up an appropriate hypothesis test. As you proceed,
a. Show the null and alternative hypotheses.
b. State the decision rule using z stat as the test statistic and a significance level of .10.
c. In the sample of 500 babies, 76 of the babies had infant reflux. Compute z stat for this sample result and report your conclusion.