Question
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
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
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