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 \(\alpha =0.05\)

1. Sample of n = 18, with r = -0.50
2. Sample of n = 15, with r = -0.50
3. Sample of n = 30, with r = 0.375
4. Sample of n = 25, with r = 0.375

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