For each sample, do a test for zero correlation.
1. r = +.45, n = 20, α = .05, two-tailed test
2. r = –.35, n = 30, α = .10, two-tailed test
3. r = +.60, n = 7, α = .05, right-tailed test
4. r = –.30, n = 61, α = .01, left-tailed test
(a) What hypotheses are being tested for Sample A?
A. H0: rho = 0 versus H1: rho ≠ 0.
B. H0: rho ≥ 0 versus H1: rho < 0.
C. H0: rho ≤ 0 versus H1: rho > 0.