For each sample, do a test for zero correlation. (a) Use Appendix D to find the critical value of tα. (b) State the hypotheses about ρ. (c) Perform the t test and report your decision. a. r= .45, n=20, α=.05, two-tailed test b. r=-.35, n=30, α=.10, two-tailed test c. r= .60, n=7, α=.05, right-tailed test d. r=-.30, n=61, α=.01, left-tailed test | Numerade
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