13. The Pearson correlation is calculated for a sample of n = 20 individuals. If a hypothesis test is used to determine whether the correlation is significant, what df value would be used for the t statistic?

a.18

b.19

c.20

d.21

14. Listed are 4 correlations. Put them in order showing the highest to lowest degree of relationship:

-0.05 +0.26 -0.97 +0.84.

15. A researcher obtains a Pearson correlation of r = 0.60 for a sample of n = 6 pairs of X and Y scores. If the researcher tests the significance of the correlation, what value will be obtained for the t statistic?

a.0.6/0.16 = 3.75

b.0.6/0.4 = 1.50

c.0/6/0.8 = 0.77

d.0.6/1.0 = 0.6

16. A set of n = 10 pairs of scores has X = 20, Y = 30, and XY = 74. What is the value of SP for these data?

a.74

b.24

c.14

d.-14