Welcome back, the first sections of Stats 2 will cover a review of stats one and an introduction to the confidence interval. Not only is it important that you understand how to create a confidence interval but you must be able to translate their meaning from stats into everyday english. In short, a confidence interval is found via a formula and states that within a certain amount of error (E) you can be certain that your data should fall between two numbers.

I've attached an example of how to create a confidence interval.