Building a confidence interval to estimate a proportion is the first of many statistical inference procedures that we will cover.

One of the key steps in creating an interval is to write a concluding interpretation sentence in the context of the problem. It often helps if you have a sentence structure that you can follow to be sure that you always interpret it correctly. Notice in the examples from the book, each sentence always includes the following information: 1) the confidence level, 2) the lower and upper bounds of the interval itself, 3) context from the given problem.

1. Write sentence structure that can be used to conclude any confidence interval problem. Leave in blanks that you can fill in the three pieces of information above, for any problem. Feel free to use the book's examples as a starting point!

2. Explain why using an interval is a better tool for estimation than just using the sample proportion (for example saying "We found 21.2% to 32.4% of students prefer online courses"instead of just saying "Our sample says 26.8% of students prefer online courses".