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A new over-the-counter cold medication includes a warning label stating that it “may cause drowsiness.” A researcher would like to evaluate this effect. It is know n that under regular circumstances the distribution of reaction times is normal with μ = 200. A sample of n = 9 participants is obtained. Each person is given the new cold medication, and. 1 hour later, reaction time is measured for each individual. The average reaction time for this sample is M = 206 with SS = 648. The researcher would like to use a hypothesis test with α = .05 to evaluate the effect of the medication. a. Use a two-tailed test with α = .05 to determine whether the medication has a significant effect on reaction time. b. Write a sentence that demonstrates how the outcome of the hypothesis test would appear in a research report. c. Use a one-tailed lest with α = .05 to determine whether the medication produces a significant increase in reaction time. d. Write a sentence that demonstrates how the outcome of the one-tailed hypothesis test would appear in a research report.

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Essentials of Statistics for the B...

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

Essentials of Statistics for the B...

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

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Chapter
Section
Chapter 9.4, Problem 1LC
Textbook Problem

A new over-the-counter cold medication includes a warning label stating that it “may cause drowsiness.” A researcher would like to evaluate this effect. It is know n that under regular circumstances the distribution of reaction times is normal with μ = 200. A sample of n = 9 participants is obtained. Each person is given the new cold medication, and. 1 hour later, reaction time is measured for each individual. The average reaction time for this sample is M = 206 with SS = 648. The researcher would like to use a hypothesis test with α = .05 to evaluate the effect of the medication.

a. Use a two-tailed test with α = .05 to determine whether the medication has a significant effect on reaction time.

b. Write a sentence that demonstrates how the outcome of the hypothesis test would appear in a research report.

c. Use a one-tailed lest with α = .05 to determine whether the medication produces a significant increase in reaction time.

d. Write a sentence that demonstrates how the outcome of the one-tailed hypothesis test would appear in a research report.

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