Confidence Interval and Hypothesis Test.

In a 1993 surveyof 560 college students, 171 said that they used illegal drugs during the previous year. In a recent survey of 720 college students, 263 said that they used illegal drugs during previous year. Using the sample data, construct the confidence intervalcorresponding to the hypothesis testconducted with a 0.05 significance level. What conclusion does the confidence suggest?

See the attached file.

According to the 1993 survey, the true proportion of college students said that they used illegal drugs during the previous year is p = 171/560 = 0.3054
According to the recent survey, the confidence …

The solution constructs confidence intervals corresponding to hypothesis tests.