2.5 Exam 6: chapter 12

Is the correlation between the number of months snowboarding and the number of injuries in the last month snowboarding significant?

• A Yes
• B No
• C Not enough information to answer question

The linear regression equation is:

• A yhat = 9.5904 – 0.9614 $x$
• B yhat = -0.7349 + 9.5904 $x$
• C yhat = 9.5904 + 0.7349 $x$
• D yhat = 9.5904 – 0.7349 $x$

If a new snowboarder has snowboarded for five (5) months, how many injuries would s/he have in the last month snowboarding?

• A 4.8
• B 47.2
• C 5.9
• D 13.3

If you calculate the line of best fit and the independent variable and the dependent variable have negative correlation, then the line of best fit has slope zero (0).

• A True
• B False
• C There is not enough information

Are there any outliers?

• A Yes
• B No
• C Not enough information

If your friend used the line of best fit to predict the cost for a 128-ounce size of gourmet ice cream, what would you tell him/her with what you have learned about linear regression?

• A That a line is not the best fit for the cost of the gourmet ice cream.
• B That the 128-ounce size of the gourmet ice cream is far too expensive.
• C That we should switch the independent and dependent variables.
• D That s/he should not use the line of best fit to make this prediction.