The Exercise 3.1.24 gave the results of the poll where 64% of a sample of 2,737 adult Americans reported drinking at least one cup of coffee per day. Use the One Proportion applet, repeatedly testing possible values for π, to determine plausible values and construct a 99% confidence interval for π.

Data from Exercises 3.1.24 

In a March 2018 national poll based on a representative sample of 2,737 adult Americans, 64% reported drinking at least one cup of coffee per day. Now suppose that we test the null hypothesis π = 0.50 vs. the alternative hypothesis π ≠ 0.50.