1.Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a random sample of n = 36 male undergraduates and a sample of n = 25 females. On average, the males reported consuming M = 2.45 drinks per month and females had an average of M = 1.28. Assume that the overall level of consumption for college undergraduates averages μ = 1.85 energy drinks per month, and that the distribution of monthly consumption scores is approximately normal with a standard deviation of σ = 1.2. The researcher wants to know if the sample of females consume significantly fewer energy drinks than the overall population average. Using symbols, state the hypotheses for the type of test you indicated in part a. (H0and H1) Sketch the appropriate distribution and locate the critical region for α = .01 for the type of test you indicated in part a. Test the researcher’s hypothesis using the appropriate statistic. What decision should be made about the null hypothesis? Be sure to use the correct language when answering this question. Compute Cohen’s dto measure the size of the effect. Is it a small, medium or large effect? Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1.Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a random sample of n = 36 male undergraduates and a sample of n = 25 females. On average, the males reported consuming M = 2.45 drinks per month and females had an average of M = 1.28. Assume that the overall level of consumption for college undergraduates averages μ = 1.85 energy drinks per month, and that the distribution of monthly consumption scores is approximately normal with a standard deviation of σ = 1.2.

The researcher wants to know if the sample of females consume significantly fewer energy drinks than the overall population average.

Using symbols, state the hypotheses for the type of test you indicated in part a. (H₀and H₁)
Sketch the appropriate distribution and locate the critical region for α = .01 for the type of test you indicated in part a.
Test the researcher’s hypothesis using the appropriate statistic.
What decision should be made about the null hypothesis? Be sure to use the correct language when answering this question.
Compute Cohen’s dto measure the size of the effect. Is it a small, medium or large effect?
Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.

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