1. Correlation is affected by outliers.

True

False

2. A researcher is trying to use January temperatures to predict latitude.

This means January temperature is the X (independent) variable and latitude is the Y (dependent) variable.

True

False

3. Suppose:

1. all the points on a scatterplot lie perfectly on a straight line going uphill

2. the mean of X and the mean of Y are both 2

3 the standard deviations of X and Y are exactly the same.

Can you find the equation of the best fitting line with this information? (Hint: Think of the '5 number' way of finding the best-fitting line.)

No

Yes

4. Suppose the correlation between two variables X and Y is .8. That means the correlation between Y and X is -.8.

True

False

5. Suppose the correlation between yards rushing and yards passing is .6. That means the correlation between feet rushing and feet passing is .6 x 12

True

False