Working while enrolled in school. A 1993 nationwide survey by the National Center for Education Statistics reports that 72% of all undergraduates work while enrolled in school.9 You decide to test whether this percent is different at your university. In your random sample of 100 students, 77 said they were currently working.

(a) Give the null and alternative hypotheses for this study.

(b) Carry out the significance test. Report the test statistic and P-value.

(c) Does it appear that the percent of students working at your university is different at the α = 0.05 level?