Regression - AP Stats

This unit, we like our scatterplot to be linear. Even if your scatter plot looks like this, can you still come up with a regression equation for it?

• No, it has to be strong and linear.

• Yes, you always can. It's just probably not useful if it looks like that.

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

This unit with Regression, what does the null hypothesis always say?

• The population slope is 0.

• The population slope is 1.

• The sample slope is 0.

• The sample slope is 1.

This unit with regression, what does the null hypothesis always say?

• There is an association between the x and y variable.

• There is no association between the x and y variable.

Tags

CCSS.HSS.ID.B.6

When doing a hypothesis test with regression; if the theory is the the "y-variable" increases as the "x-variable" increases, what's your alternate hypothesis?

• β≠0

• β>0

• β<0

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

When doing a hypothesis test with regression; if the theory is the the "y-variable" increases as the "x-variable" decreases, what's your alternate hypothesis?

• β≠0

• β>0

• β<0

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

When doing a hypothesis test with regression; if the theory is just wondering if there is a relationship between the "x variable" and "y variable", what's your alternate hypothesis?

• β≠0

• β>0

• β<0

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

With this regression output, what's the y-intercept for the regression equation?

• 50.23

• 5.41

• 2.6

• 2.08

• 0.0529

Tags

CCSS.HSS.ID.C.7

With this regression output, what's the slope for the regression equation?

• 50.23

• 5.41

• 2.6

• 2.08

• 0.0529

Tags

CCSS.HSS.ID.C.7

With this regression output, what's the test statistic for a hypothesis test?

• 50.23

• 5.41

• 2.6

• 2.08

• 0.0529

The p-value is in the very bottom right corner. What do we sometimes do to it?

• We multiply it by 2 when the HA is β>0 or β<0

• We divide it by 2 when the HA is β>0 or β<0

• We divide it by 2 when the HA is β≠0

• We multiply it by 2 when the HA is β≠0