A high school counselor desires to analyze whether the teenage pregnancy rate at her school is different from rate nationwide. She knows that the rate nationwide is 15 %. She randomly chooses 80 female students from her high school. She finds that 9 out of 80 students are either pregnant now or have been pregnant previously.
a. What statistical test should be employed to examine the data?
b. Determine H0 and Ha for this study
c. Conduct the appropriate analysis
d. Should H0 be rejected? What should the researcher conclude?