If the outcome of a repeated-measures t test is reported as t(23) = 2.76, what is the correct conclusion for an experiment that tested the effect of meditation on memory?
A. The data showed a significant effect meditation on memory with p < .05 but no significant effect with p < .01, 2-tails test.
B. The data showed a significant effect of meditation on memory with p < .05 and p < .01, 2-tails test.
C. The data showed a significant effect of meditation on memory with p < .01 but no significant effect with p < .05, 2-tails test.
D. The data showed no significant effect of meditation on memory with either p < .05 or p < .01, 2-tails test.
34. In a repeated-measures study examining the effect of therapy on eating disorders on a sample n = 21 participants, a researcher found a mean difference of M_{D} = 14 and an estimated standard, s_{MD} = 8. What is the value of the repeated-measures t-test for these data?
A. 1.25
B. 2.00
C. 1.75
D. 1.50
33. A repeated-measures study with n = 25 participants produces M_{D}= 22 and s = 45 of the difference scores, D. What is the estimated standard error for these data?
A. 5
B. 9
C. 3
D. None of these.
32.
For the following data from a repeated-measures study, what is the sample mean difference, M_{D}?
Participant X_{1 }X_{2}
A 1 5
B 4 6
C 5 2
A. 23/2 = 11.5 (or - 11.5)
B. 23/6 = 3.83 (or - 3.83)
C. 9/3 = 3.0 (or - 3)
D. 3/3 = 1.0 (or -1)
E. None of the above.
31. Which combination of factors is most likely to produce a significant value of an independent-samples t-test?
A. A large difference between sample means and a small estimated standard error.
B. A small difference between sample means and a large estimated standard error.
C. A small difference between sample means and a small estimated standard error.
D. A large difference between sample means and a large estimated standard error.
1)
p value=0.0111 [ excel function:"=T.DIST.2T(2.76,23)"
A. The data showed a significant effect meditation on memory with p < .05 but no significant effect with p < .01, 2-tails test.
2) t = 14/8 = 1.75
3) Standard Error , SE = s/√n = 45.0000 / √ 25 = 9
32)
sample mean difference = (-4-2+3)/3=-3/3 = -1
D. 3/3 = 1.0 (or -1)
31)
A. A large difference between sample means and a small estimated standard error
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