Question

For each sample, do a test for zero correlation.

a.	r = +0.50, n = 15, α = 0.05, two-tailed test
b.	r = –0.35, n = 30, α = 0.10, two-tailed test
c.	r = +0.64, n = 5, α = 0.05, right-tailed test
d.	r = –0.31, n = 50, α = 0.01, left-tailed test
(a)	What hypotheses are being tested for Sample A?

a.	H0: ρ = 0 versus H1: ρ ≠ 0.
b.	H0: ρ ≥ 0 versus H1: ρ < 0.
c.	H0: ρ ≤ 0 versus H1: ρ > 0.
	a b c

(b)	Perform the t test and report your decision. (Round tcalc answers to 3 decimal places and p-values to 4. Negative values should be indicated by a minus sign.)

Sample	tcalctcalc	p−valuep-value	Decision
a			(Click to select)RejectFail to reject H0H0
b			(Click to select)Fail to rejectReject H0H0
c			(Click to select)Fail to rejectReject H0H0
d			(Click to select)RejectFail to reject H0H0

Answer 1