Research Methods for the Behavioral Sciences (MindTap Course List)

6th Edition

ISBN: 9781337613316

Author: Frederick J Gravetter, Lori-Ann B. Forzano

Publisher: Cengage Learning

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Textbook Question

Chapter 15, Problem 6E

Describe a distribution of scores that has a mean of M = 30 and a standard deviation of SD = 6. (Where are the scores centered? What range of values contains most of the scores?)

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 15, Problem 5E

Chapter 15, Problem 7E

Chapter 15 Solutions

Research Methods for the Behavioral Sciences (MindTap Course List)

Ch. 15.1 - Define the two general categories of statistics,...Ch. 15.1 - Prob. 2LO Ch. 15.2 - Prob. 3LO Ch. 15.2 - Prob. 4LO Ch. 15.2 - Prob. 5LO Ch. 15.2 - Prob. 6LO Ch. 15.3 - Prob. 7LO Ch. 15.3 - Prob. 8LO Ch. 15.3 - Explain how sample size and sample variance...Ch. 15.4 - Identify the characteristics that differentiate...

Ch. 15.5 - Describe the two basic concerns with the...Ch. 15.5 - Describe the basic concern with measuring...Ch. 15 - In addition to the key words, you should also be...Ch. 15 - Prob. 2E Ch. 15 - A researcher who is interested in examining the...Ch. 15 - Construct a frequency distribution histogram or...Ch. 15 - Under what circumstances are the median and the...Ch. 15 - Describe a distribution of scores that has a mean...Ch. 15 - Prob. 7E Ch. 15 - Describe the general concept of sampling error and...Ch. 15 - Briefly explain what is meant when a researcher...Ch. 15 - Prob. 10E Ch. 15 - Describe the relationship between the alpha level...Ch. 15 - Explain how increasing the size of the sample can...Ch. 15 - Prob. 13E Ch. 15 - Identify the appropriate hypothesis test for each...Ch. 15 - Prob. 15E Ch. 15 - Prob. 16E

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Describe a distribution of scores that has a mean of M = 30 and a standard deviation of SD = 6. (Where are the scores centered? What range of values contains most of the scores?)

Solution Summary: The author explains how a distribution with mean M=30 and SD=6 can be interpreted as having the center value of the distribution at 30 and spread at 48.

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Chapter 15 Solutions