September is Library Card Sign-up Month. According to a nationwide Harris Poll during August 2008, 68% of American adults own a library card. Suppose you conduct a survey of 1000 randomly chosen adults in order to test Ho: p = 0.68 versus Ha: p < 0.68 where p represents the proportion of adults who currently have a library card; 651 of the 1000 sampled had a library card. Use a = 0.01
a. Calculate the value of the test statistic.
b. Solve using the p-value approach.
c. Solve using the classical approach