Essentials of Statistics for the Behavioral Sciences
8th Edition
ISBN: 9781133956570
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Chapter 8, Problem 3RE
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 that 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
a. Did this sample of males consume significantly more energy drinks than the overall population average? Use a one-tailed test with
b. Did this sample of females consume significantly fewer energy drinks than the overall population average? Use a one-tailed test with
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Chapter 8 Solutions
Essentials of Statistics for the Behavioral Sciences
Ch. 8.1 - The city school district is considering increasing...Ch. 8.1 - Prob. 2LCCh. 8.1 - Prob. 3LCCh. 8.1 - A researcher selects a sample of n = 16...Ch. 8.1 - A small value (near zero) for the z-score...Ch. 8.1 - Prob. 3LCACh. 8.2 - Prob. 1LCCh. 8.2 - Prob. 2LCCh. 8.2 - Prob. 3LCCh. 8.2 - Prob. 4LC
Ch. 8.2 - If a sample mean is in the critical region with =...Ch. 8.3 - Prob. 1LCCh. 8.3 - In a research report, the term significant is used...Ch. 8.3 - Prob. 3LCCh. 8.3 - Prob. 4LCCh. 8.3 - Prob. 5LCCh. 8.4 - A researcher selects a sample from a population...Ch. 8.4 - Prob. 2LCCh. 8.4 - A researcher obtains z = 2.43 for a hypothesis...Ch. 8.5 - Prob. 1LCCh. 8.5 - A researcher selects a sample from a population...Ch. 8.5 - Prob. 3LCCh. 8.6 - Prob. 1LCCh. 8.6 - For a 5-point treatment effect, a researcher...Ch. 8.6 - Prob. 3LCCh. 8.6 - Prob. 4LCCh. 8 - The value of the z-score in a hypothesis test is...Ch. 8 - Define the alpha level and the critical region,...Ch. 8 - Although there is a popular belief that herbal...Ch. 8 - Childhood participation in sports, cultural...Ch. 8 - A local college requires an English composition...Ch. 8 - A random simple is selected from a normal...Ch. 8 - A random sample of n = 25 scores is selected from...Ch. 8 - Brunt, Rhee, and Zhong (2008) surveyed 557...Ch. 8 - A random simple is selected from a normal...Ch. 8 - In a study examining the effect of alcohol on...Ch. 8 - The researchers cited in the previous problem...Ch. 8 - There is some evidence indicating that people with...Ch. 8 - Researchers at a National Weather Center in the...Ch. 8 - Montarello and Martens (2005) found that...Ch. 8 - Researchers hate noted a decline in cognitive...Ch. 8 - A researcher plans to conduct an experiment...Ch. 8 - A sample of n = 40 is selected from a normal...Ch. 8 - Briefly explain how increasing sample size...Ch. 8 - Explain how the power of a hypothesis test is...Ch. 8 - A researcher is investigating the effectiveness of...Ch. 8 - A researcher is evaluating the influence of a...Ch. 8 - Find each of the requested values for a population...Ch. 8 - A survey of high school seniors shows that the...Ch. 8 - Miller (2008) examined the energy drink...
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