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?