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.

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

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