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 \(\alpha =0.05\)

(a) Sample of n = 18, with r = -0.50

(b) Sample of n = 15, with r = -0.50

(c) Sample of n = 30, with r = 0.375

(d) Sample of n = 25, with r = 0.375