# 8: Finding Confidence Interval for Population Mean and Proportion


• 8.1: Inference for Numerical Data
• 8.2: Inference for Categorical Data
This chapter 6 introduces inference in the setting of categorical data We will find that the methods we learned in previous chapters are very useful in these settings. Sample proportions are well characterized by a nearly normal distribution when certain conditions are satisfied, making it possible to employ the usual confidence interval and hypothesis testing tools.
• 8.3: Confidence Intervals
In this chapter, you will learn to construct and interpret confidence intervals. You will also learn a new distribution, the Student's-t, and how it is used with these intervals. Throughout the chapter, it is important to keep in mind that the confidence interval is a random variable. It is the population parameter that is fixed.
• 8.4: PowerPoints

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