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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Concept explainers

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

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Textbook Question

Chapter 15, Problem 5E

Under what circumstances are the median and the mode considered to be better than the mean for describing central tendency.

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 4E

Chapter 15, Problem 6E

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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Under what circumstances are the median and the mode considered to be better than the mean for describing central tendency .

Solution Summary: The author explains that when data is skewed, median and mode are considered to be better than mean for describing central tendency.

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Chapter 15 Solutions