1 The y on x regression line and the x on y regression lines are always perpendicular True False 2 If the pmcc between two variables is high then one variable must depend on the other True False 3 The regression line always passes through the mean point True False 4 If the scatter diagram shows the data fitting very closely to a curved line then the pmcc will be high True False 5 Regression lines are useful for making predications True False 6 A pmcc of -1 means there is no connection between the data at all True False 7 If the pmcc is close to zero, then predications made from the regression line may be unreliable True False 8 Making predictions outside the range of given data is called extrapolation True False 9 Residual means the same as outlier True False 10 A pmcc of 0.65 would be described as moderately strong True False

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