Question: For each of the following , determine whether the sample provides enough evidence to conclude that there is a significant, nonzero correlation in the population. In each case, use a two-tailed test with α = .05.

a. A sample of n= 18 with r = -0.50.

b. A sample of n= 15 with r =.-0.50.

c. A sample of n= 30 with r = 0.375.

d. A sample of n= 25 with r = 0.375.