Given the following information, use Table B.4 in Appendix B to determine whether the correlations are significant and how you would interpret the results.

1 The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.

2 The correlation between the number correct on a math test and the time it takes to complete the test is –.45. Test whether this correlation is significant for 80 children at the .05 level of significance. Choose either a one- or a two-tailed test and justify your choice.

3 The correlation between number of friends and grade point average (GPA)

for 50 adolescents is .37. Is this significant at the .05 level for a two-tailed test?