This document discusses confidence intervals for means and proportions. It defines key terms like point estimates, interval estimates, confidence levels, and confidence intervals. It provides formulas for calculating confidence intervals for means when the population standard deviation is known or unknown, and when the sample size is greater than or less than 30. Formulas are also given for calculating confidence intervals for proportions, and for determining the minimum sample size needed for estimating means and proportions within a desired level of accuracy. Examples of applying these concepts to sample data are also included.

1. Chapter 7 – Confidence Intervals and Sample Size

16. 7-3 Confidence Intervals for the Mean (  Unknown and n < 30)

23. 7-4 Confidence Intervals and Sample Size for Proportions