15. The researchers cited in the previous problem (Liguori and Robinson, 2001) also examined the effect of caf- feine on response time in the driving simulator. In a similar study, researchers measured reaction time 30 minutes after participants consumed one 6-ounce cup of coffee. Using the same driving simulation task, for which the distribution of reaction times is normal with 40, they obtained a mean of 36 participants. u = 400 msec and o = M = 392 for a sample of n = a. Are the data sufficient to conclude that caffeine has a significant effect on reaction time? Use a two- tailed test with a = .05. %3D b. Compute Cohen's d to estimate the size of the effect. C. Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.
15. The researchers cited in the previous problem (Liguori and Robinson, 2001) also examined the effect of caf- feine on response time in the driving simulator. In a similar study, researchers measured reaction time 30 minutes after participants consumed one 6-ounce cup of coffee. Using the same driving simulation task, for which the distribution of reaction times is normal with 40, they obtained a mean of 36 participants. u = 400 msec and o = M = 392 for a sample of n = a. Are the data sufficient to conclude that caffeine has a significant effect on reaction time? Use a two- tailed test with a = .05. %3D b. Compute Cohen's d to estimate the size of the effect. C. Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter1: Functions
Section1.2: The Least Square Line
Problem 8E
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Transcribed Image Text:15. The researchers cited in the previous problem (Liguori
and Robinson, 2001) also examined the effect of caf-
feine on response time in the driving simulator. In a
similar study, researchers measured reaction time
30 minutes after participants consumed one 6-ounce cup
of coffee. Using the same driving simulation task, for
which the distribution of reaction times is normal with
u = 400 msec and o = 40, they obtained a mean of
M = 392 for a sample of n =
a. Are the data sufficient to conclude that caffeine has
a significant effect on reaction time? Use a two-
tailed test with a = .05.
36 participants.
%3D
%3D
D. Compute Cohen's d to estimate the size of the
effect.
C. Write a sentence describing the outcome of the
hypothesis test and the measure of effect size as it
would appear in a research report.
- porth-
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