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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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 2, Problem 6P

The following scores are the ages for a random sample of n = 30 drivers who were issued speeding tickets in New York during 2008. Determine the best interval width and place the scores in a grouped frequency distribution table. Prom looking at your table, does it appear that tickets are issued equally across age groups?

17	30	45	20	39	53	28	19
24	21	34	38	22	29	64
22	44	36	16	56	20	23	58
32	25	28	22	51	26	43

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Chapter 2, Problem 5P

Chapter 2, Problem 7P

Chapter 2 Solutions

Essentials of Statistics for the Behavioral Sciences

Ch. 2.2 - Construct a frequency distribution table for the...Ch. 2.2 - Find each of the following values for the sample...Ch. 2.2 - Prob. 1LCA Ch. 2.2 - Prob. 2LCA Ch. 2.2 - Prob. 3LCA Ch. 2.4 - Sketch a histogram and a polygon showing the...Ch. 2.4 - Describe the shape of the distribution in Exercise...Ch. 2.4 - Prob. 3LC Ch. 2.4 - If the results from a research study are presented...Ch. 2.4 - Prob. 5LC

Ch. 2 - Place the following set of n = 20 scores in a...Ch. 2 - Construct a frequency distribution table for the...Ch. 2 - Find each value requested for the distribution of...Ch. 2 - Find each value requested for the distribution of...Ch. 2 - For the following scores, the smallest value is X...Ch. 2 - The following scores are the ages for a random...Ch. 2 - For each of the following samples, determine the...Ch. 2 - What information is available about the scores in...Ch. 2 - Describe the difference in appearance between a...Ch. 2 - For the following set of scores: 8 5 9 6 8 7 4 10...Ch. 2 - Sketch a histogram and a polygon showing the...Ch. 2 - Sketch a histogram showing the distribution of...Ch. 2 - A survey given to a sample of college students...Ch. 2 - Each year the college gives away T shirts to new...Ch. 2 - Gaucher, Friesen, and Kay (2011) found that words...Ch. 2 - Find each or the followin.tt values for the...Ch. 2 - Prob. 17P Ch. 2 - Place the following scores in a frequency...Ch. 2 - For the following set of scores: 8 6 7 5 4 10 8 9...Ch. 2 - Fowler and Christakis (2008) report that personal...Ch. 2 - Recent research suggests that the amount of lime...

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17	30	45	20	39	53	28	19
24	21	34	38	22	29	64
22	44	36	16	56	20	23	58
32	25	28	22	51	26	43

17	30	45	20	39	53	28	19
24	21	34	38	22	29	64
22	44	36	16	56	20	23	58
32	25	28	22	51	26	43

Solution Summary: The author explains how to determine the best interval width and place the scores in a grouped frequency distribution table.

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Chapter 2 Solutions

17	30	45	20	39	53	28	19
24	21	34	38	22	29	64
22	44	36	16	56	20	23	58
32	25	28	22	51	26	43