True or False questions 1. The F-ratio evaluating the significance of a linear r

Question

True or False questions

1. The F-ratio evaluating the significance of a linear regression equation based on n=10 pairs of X and Y scores has df =1,8

True or False

2. A partial correlation measures the relationship that exists between two variable while a third variable is controlled or held constant

True or false

3. The Pearson correlation between X1 and Y is r= 0.50. When a second variable ,X2, is added to the regression equation, we obtain R2= 0.60. Adding the second variable increase the variability that is predicted by the regression equation for the Y scores by 36%-25%= 11%.

True or false

Explanation / Answer

1) p = 2

n-p-1 = 10-2-1 = 7

Df = 2,7

FALSE

2) A partial correlation measures the relationship that exists between two variable while a third variable is controlled or held constant

TRUE

3) TRUE

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