A researcher finds a 0.31 Pearson's r correlation between amount of time it takes to complete a puzzle and IQ scores for 97 adult participants. What is the correct decision about the null hypothesis test? Group of answer choices a. Reject the null hypothesis with α= .05 but not with α= .01. b. Fail to reject the null hypothesis with α= .05 and with α= .01. c. Fail to reject the null hypothesis with α= .05 but not with α= .01. d. Reject the null hypothesis with α= .05 and with α= .01.
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A single sample t-test conducted on a sample of n = 20 participants produces a t statistic of t = 2.53. For a two-tailed test, what is the correct decision about the outcome of the test? A. The researcher can reject the null hypothesis with α = .05 but not with α = .01. B. The researcher can reject the null hypothesis with α = .01 but not with α = .05. C. The researcher must fail to reject the null hypothesis with either α = .05 or α = .01. D. The researcher can reject the null hypothesis with either α = .05 or α = .01.
Prabhakar K.
A single sample t-test conducted on a sample of n = 20 participants produces a t statistic of t = 2.53. For a two-tailed test, what is the correct decision about the outcome of the test? A. The researcher can reject the null hypothesis with either α = 0.05 or α = 0.01. B. The researcher can reject the null hypothesis with α = 0.05 but not with α = 0.01. C. The researcher can reject the null hypothesis with α = 0.01 but not with α = 0.05. D. The researcher must fail to reject the null hypothesis with either α = 0.05 or α = 0.01.
Dr. Huitema reported the results of a test on Pearson's r as r(50) = 0.40, p = 0.003, two-tailed. If he set alpha = 0.05, what decision should he make about the null hypothesis? a. Reject b. Fail to reject c. Not enough information to decide.
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