Suppose that the correlation between weight and the number of hours spent working out per week is ...

Suppose that the correlation between weight and the number of hours spent working out per week is +.84 . What proportion (or percent) of the variability in weight is accounted for by the relationship with the number of hours spent working out?
 
  a. 91
  b. 71
  c. 42
  d. Cannot be determined

Question 2

Suppose that the correlation between height and weight for adults is +.75 . What proportion (or percent) of the variability in weight is accounted for by the relationship with height?
 
  a. 75
  b. 25
  c. 56
  d. Cannot be determined

Question 3

When determining the cross-products for your correlation coefficient, if positive z scores on one variable go with negative z scores on the other variable and negative z scores on one variable go with positive z scores on the other variable, then the correlation coefficient will be:
 
  a. negative.
  b. strong.
  c. weak.
  d. positive.

Question 4

When determining the cross-products for your correlation coefficient, if positive z scores on one variable go with positive z scores on the other variable and negative z scores on one variable go with negative z scores on the other variable, then the correlation coefficient will be:
 
  a. negative.
  b. strong.
  c. weak.
  d. positive.