Statistics for the Behavioral Sciences, Loose-leaf Version

10th Edition

ISBN: 9781305862807

Author: GRAVETTER

Publisher: CENGAGE L

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Textbook Question

Chapter 6, Problem 13P

13. A normal distribution has a mean .of µ=30 and a standard deviation of σ = 12 .For each ,of the following core indicate whether the body is to the right or left of the core and find the proportion of the distribution located in the body.

a. X= 33

b. X= l 8

c. x= 24

d. X= 39

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 6 Solutions

Statistics for the Behavioral Sciences, Loose-leaf Version

Ch. 6 - What are the two requirements for a random sample?Ch. 6 - Define sampling with replacement and explain why...Ch. 6 - Around Halloween each year the grocery store sells...Ch. 6 - A psychology class consists of 28 males and 52...Ch. 6 - 5. Draw a vertical line through a normal...Ch. 6 - Draw a vertical line through a normal distribution...Ch. 6 - Find each of the following probabilities for a...Ch. 6 - S. What proportion of a normal distribution is...Ch. 6 - Find each of the following probabilities for a...Ch. 6 - 10. Find the z-score location of a vertical line...

Ch. 6 - Find the z-score boundaries that separate a normal...Ch. 6 - A normal distribution has a mean of =70 and a...Ch. 6 - 13. A normal distribution has a mean .of µ=30 and...Ch. 6 - For a normal distribution with a mean of =60and a...Ch. 6 - 15. In 20l4, the New York Yankees had a team...Ch. 6 - 16. IQ test scores are standardized to produce a...Ch. 6 - The distribution of scores on the SAT is...Ch. 6 - 18. According to a recent report, people .smile an...Ch. 6 - A report in 20 l0 indicates that Americans between...Ch. 6 - , Rochester, New York, averages µ = 2 l .9 inches...Ch. 6 - A multiple-choice test has 32 questions, ,each...Ch. 6 - A true/false test has 20 questions. If a student...Ch. 6 - A roulette wheel has alternating red and black...Ch. 6 - A test developed to measure ESP involves using...Ch. 6 - The student health clinic reports that only 30%,...

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13. A normal distribution has a mean .of µ=30 and a standard deviation of σ = 12 . For each ,of the following core indicate whether the body is to the right or left of the core and find the proportion of the distribution located in the body. a. X= 33 b. X= l 8 c. x= 24 d. X= 39

Solution Summary: The author explains how to determine whether the body is to the right or left of a given score and the proportions of the distribution located in it.

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Chapter 6 Solutions