14. In a study examining the effect of alcohol on reaction time, Liguori and Robinson (2001) found that even moderate alcohol consumption significantly slowed response time to an emergency situation in a driving simulation. In a similar study, researchers measured reaction time 30 minutes after participants consumed one 6-ounce glass of wine. Again, they used a stan- dardized driving simulation task for which the regular population averages u reaction times is approximately normal with o = Assume that the researcher obtained a sample mean of M = 422 for the n = 25 participants in the study. a. Are the data sufficient to conclude that the alcohol has a significant effect on reaction time? Use a two-tailed test with a = 400 msec. The distribution of 40. %3D %3D %3D 18. R .01. ti b. Do the data provide evidence that the alcohol significantly increased (slowed) reaction time? Use a one-tailed test with a = .01. c. Compute Cohen's d to estimate the size of the effect. re d. la re

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Author:Amos Gilat
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14. In a study examining the effect of alcohol on reaction
time, Liguori and Robinson (2001) found that even
moderate alcohol consumption significantly slowed
response time to an emergency situation in a driving
simulation. In a similar study, researchers measured
reaction time 30 minutes after participants consumed
one 6-ounce glass of wine. Again, they used a stan-
dardized driving simulation task for which the regular
population averages u
reaction times is approximately normal with o =
Assume that the researcher obtained a sample mean of
M = 422 for the n = 25 participants in the study.
a. Are the data sufficient to conclude that the alcohol
has a significant effect on reaction time? Use a
two-tailed test with a =
400 msec. The distribution of
40.
%3D
%3D
%3D
18. R
.01.
ti
b. Do the data provide evidence that the alcohol
significantly increased (slowed) reaction time? Use
a one-tailed test with a = .01.
c. Compute Cohen's d to estimate the size of the
effect.
re
d.
la
re
Transcribed Image Text:14. In a study examining the effect of alcohol on reaction time, Liguori and Robinson (2001) found that even moderate alcohol consumption significantly slowed response time to an emergency situation in a driving simulation. In a similar study, researchers measured reaction time 30 minutes after participants consumed one 6-ounce glass of wine. Again, they used a stan- dardized driving simulation task for which the regular population averages u reaction times is approximately normal with o = Assume that the researcher obtained a sample mean of M = 422 for the n = 25 participants in the study. a. Are the data sufficient to conclude that the alcohol has a significant effect on reaction time? Use a two-tailed test with a = 400 msec. The distribution of 40. %3D %3D %3D 18. R .01. ti b. Do the data provide evidence that the alcohol significantly increased (slowed) reaction time? Use a one-tailed test with a = .01. c. Compute Cohen's d to estimate the size of the effect. re d. la re
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