You can follow the discussion on Homework for Lesson Chapter 6:
Lesson 20: Confidence Intervals for the Mean When S Is Known and Sample Size
Lesson 21: Confidence Intervals for the Mean When S Is Unknown
Lesson 22: Confidence Intervals for Variances and Standard Deviations
Lesson 23: Confidence Intervals and Sample Size for Proportions without having to leave a comment. Cool, huh? Just enter your email address in the form here below and you’re all set.