AP Statistics - Mean and Linear Regression

1

Bob wants to statistically determine if the mean height of middle school boys is greater than the mean height of middle school girls. He wants to use a significance level of What must be true for him to reject $H_{o}: \mu _{boys} = \mu _{girls}$ . $\sigma$ is known.

2

Suppose you conduct a paired -test to assess whether two group means significantly differ and find a -score of 1.645. At what alpha level would this cause you to reject the null?

3

Bob wants to statistically determine if the mean height of middle school boys is greater than the mean height of middle school girls. He wants to use a significance level of What must be true for him to reject $H_{o}: \mu _{boys} = \mu _{girls}$ . $\sigma$ is known.

4

Suppose you conduct a paired -test to assess whether two group means significantly differ and find a -score of 1.645. At what alpha level would this cause you to reject the null?

5

6

7

Which of the following is an incorrect condition requirement for regression inference?

8

A statistician conducts a regression analysis and obtains a p-value of 0.1. It is more likely than not that there is a relationship between the variables in the study.

9

For a data set, the least-squares regression line has a confidence interval for the slope of .

Based on this confidence interval, what can you do with a hypothesis test at significance level where $H_0: \beta _1 = 0$ and $H_a: \beta _1 eq 0$ ?

10

A statistician conducts a regression analysis and obtains a p-value of 0.1. It is more likely than not that there is a relationship between the variables in the study.

Mean and Linear Regression

Practice Questions