Question: In the study of binge drinking mentioned in Exercise 10.3, the percent who said they had engaged in unplanned sexual activities because of drinking alcohol

In the study of binge drinking mentioned in Exercise 10.3, the percent who said they had engaged in unplanned sexual activities because of drinking alcohol was 30.7% in 1999 and 23.0% in 2009. Is this change statistically significant at the 0.05 significance level?
a. Specify assumptions, notation, and hypotheses for a two-sided test.
b. Show how to find the pooled estimate of the proportion to use in a test. (You need the count in each year rather than the proportion. In 1999, note this is (0.307)334 = 103.) Interpret this estimate.
c. Find the standard error for the difference used in the test. Interpret it.
d. Find the test statistic and P-value. Make a decision using a significance level of 0.05.

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