For each sample, do a test for zero correlation. a. r = +.45, n = 20, alpha = 05
ID: 3270713 • Letter: F
Question
For each sample, do a test for zero correlation. a. r = +.45, n = 20, alpha = 05, two-tailed test b. r = -.35, n = 30, alpha = 10, two-tailed test c. r = +.60, n = 7, alpha = 05, right-tailed test d. r = -.30, n = 61, alpha = 01, left-tailed test (a) What hypotheses are being tested for Sample A? a. H_0: rho = 0 versus H_1: rho notequalto 0. b. H_0: rho greaterthanorequalto 0 versus H_1: rho 0. a b c (b) Use Appendix D to find the critical value of t_a. Perform the t test and report your decision. (Round your answers to 3 decimal places. Negative values should be indicated by a minus sign.)Explanation / Answer
b question
b part:
Test statistic: t=r * n2/1r2
t = - 0.35 * 302/10.352
t = - 1.977
d part t critical:
t = -2.391
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