Chapter 12: Inference for Proportions

Calculator Skills:

§ 1-PropZTest

§ 1-PropZInt

§ 2-PropZTest

§
2-PropZInt

12.1 Inference for a Population Proportion (pp.684-701)

1.
In statistics, what is meant by a *sample proportion*?

2. Give the mean and standard deviation for the sampling distribution of ?

3. How do you calculate the standard error of ?

4.
What assumptions must be met in order to use *z procedures* for
inference about a proportion?

5. Describe how to construct a level C confidence interval for a population proportion.

6. For a one-sample hypothesis test where , what is the z test statistic?

7. What formula is used to determine the sample size necessary for a given margin of error?

12.2
Comparing Two Proportions (pp.702-722)

1. Give the mean and standard deviation for the sampling model of .

2. How do you calculate the standard error of ?

3.
What assumptions must be met in order to use *z procedures* for
inference about two proportions?

4. Describe how to construct a level C confidence interval for the difference between two proportions, .

5. For a two-sample hypothesis test where , what is the z test statistic?