math week 9

Chapter 9 Lecture Questions

1. How is a point estimate of a proportion determined?

2. What is the purpose of a confidence interval?

3. How do you find the point estimate and margin of error if you are given the upper and lower limit?

4. Why are there 2 equations to determine a sample size of a proportion? Explain

5. Once you have found your confidence interval, how do we interpret it?

6. List the 3 Common confidence levels and their corresponding Z score. (These are the 4 in the powerpoint)

7. Why do population means require the use of the T score?

8. What distribution is used for estimating standard deviations?