Chapter 8, Problem 10P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

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 alter participants consumed one 6-ounce glass of wine. Again, they used a standardized driving simulation task for which the regular population averages
*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

**b.** Do the data provide evidence that the alcohol significantly increased (slowed) reaction time?

Use a one-tailed lest with

**c.** Compute Cohen's *d* to estimate the size of the effect.

**a.**

To determine

Whether the alcohol has a significant effect on reaction time.

Explanation

**Given Info:**

The population mean

**Calculation:**

The test hypotheses are,

*Null hypothesis:*

That is, Alcohol has a significant no effect on reaction time

*Alternative hypothesis*

That is, Alcohol has a significant effect on reaction time.

From the standard normal table, the critical region for

**b.**

To determine

Whether the alcohol significantly increased reaction time at level of significance
α = 0.05 .

**c.**

To determine

**To find:** The Cohen’s *d*.

Sect-8.1 P-1LCSect-8.1 P-2LCSect-8.1 P-3LCSect-8.1 P-1LCASect-8.1 P-2LCASect-8.1 P-3LCASect-8.2 P-1LCSect-8.2 P-2LCSect-8.2 P-3LCSect-8.2 P-4LC

Sect-8.2 P-5LCSect-8.3 P-1LCSect-8.3 P-2LCSect-8.3 P-3LCSect-8.3 P-4LCSect-8.3 P-5LCSect-8.4 P-1LCSect-8.4 P-2LCSect-8.4 P-3LCSect-8.5 P-1LCSect-8.5 P-2LCSect-8.5 P-3LCSect-8.6 P-1LCSect-8.6 P-2LCSect-8.6 P-3LCSect-8.6 P-4LCCh-8 P-1PCh-8 P-2PCh-8 P-3PCh-8 P-4PCh-8 P-5PCh-8 P-6PCh-8 P-7PCh-8 P-8PCh-8 P-9PCh-8 P-10PCh-8 P-11PCh-8 P-12PCh-8 P-13PCh-8 P-14PCh-8 P-15PCh-8 P-16PCh-8 P-17PCh-8 P-18PCh-8 P-19PCh-8 P-20PCh-8 P-21PCh-8 P-1RECh-8 P-2RECh-8 P-3RE

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