 # The researchers cited in the previous problem (Liguori &amp; Robinson. 2001) also examined the effect of caffeine 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 μ = 400 msec, and σ = 40, they obtained a mean of M = 392 for a sample of n = 36 participants. a. Are the data sufficient to conclude that caffeine has a significant effect on reaction time? Use a two-tailed test with α = . 05. 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. ### Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570 ### Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570

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Chapter 8, Problem 11P
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