The researchers cited in the previous problem (Liguori & Robinson, 2001) also examined the effect of caffeine
Question:
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 s = 40, they obtained a mean of µ = 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 a = .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.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Related Book For
Essentials Of Statistics For The Behavioral Sciences
ISBN: 9781133956570
8th Edition
Authors: Frederick J Gravetter, Larry B. Wallnau
Question Posted: