According to the U.S. Census Bureau, the proportion of students in high school who have a part time job is 0.25. An that the proportion of students at her school who have a part time job is less national figure. The administrator selects a random sampl chool and finds that 39 of them have a part time job. Administrator at a local high school suspects than the e of 200 students from th
A. Is there enough evidence at the α = 0.05 level that proportion is less than the national figure?
B. Perform and interpret a 90% confidence interval for the high school students who have a part-time job.