The Essentials of Statistics: A Tool for Social Research
4th Edition
ISBN: 9781305802698
Author: Joseph F. Healey
Publisher: Cengage Learning US
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Chapter 5, Problem 5.14P
After taking the state merit examinations for the position of school counselor and social worker, you receive the following information on the tests and on your performance. On which test did you do better?
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The height of the graph of the probability density function f(x) varies with X as follows (round to four decimal places):
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○ 0.5
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onsider a random variable x that follows a uniform distribution, with a = 2 and b = 9.
What is the probability that x is less than 6?
P(x < 6) = 0.2857
P(x < 6) = 0.5714
P(x < 6) = 0.17142
P(x < 6) = 0.4286
What is the probability that x is between 4 and 6?
P(4 ≤ x ≤ 6) = 0.2857
P(4 ≤ x ≤ 6) = 0.157135
P(4 ≤ x ≤ 6) = 0.0928525
P(4 ≤ x ≤ 6) = 0.11428
Consider a random variable x that follows a uniform distribution, with a = 8 and b = 14.
What is the probability that x is less than 13?
P(x < 13) = 0.1667
P(x < 13) = 0.41665
P(x < 13) = 0.24999
P(x < 13) = 0.8333
What is the probability that x is between 11 and 12?
P(11 ≤ x ≤ 12) = 0.0541775
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P(11 ≤ x ≤ 12) = 0.06668
P(11 ≤ x ≤ 12) = 0.091685
Chapter 5 Solutions
The Essentials of Statistics: A Tool for Social Research
Ch. 5 - Scores on a quiz were normally distributed and had...Ch. 5 - Assume that the distribution of scores on a...Ch. 5 - The senior class has been given a comprehensive...Ch. 5 - For a normal distribution where the mean is 50 and...Ch. 5 - At St. Algebra College, the 200 freshmen enrolled...Ch. 5 - If a distribution of test scores is normal, with a...Ch. 5 - SOC A scale measuring prejudice has been...Ch. 5 - SOC On the scale mentioned in problem 5.7, if a...Ch. 5 - For a math test on which the mean score was 59 and...Ch. 5 - SOC The average number of dropouts for a school...
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