STAT TECH IN BUSINESS & ECON AC
18th Edition
ISBN: 9781264731657
Author: Lind
Publisher: MCG
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Chapter 6, Problem 12E
Assume a binomial distribution where n = 5 and π = .30.
- a. Refer to Appendix B.1 and list the
probabilities for values of x from 0 to 5. - b. Determine the mean and standard deviation of the distribution from the general definitions given in formulas (6–1) and (6–2).
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13.11 Random numbers. If you ask a computer to generate “random numbers" between 0
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curve for a uniform distribution. This curve takes the constant value 0.2 between 0 and 5 and
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a. Why is the total area under the curve equal to 1?
b. The curve is symmetric. What is the value of the mean and median?
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height = 0,20
Moore/Notz, Statistics: Concepts and Controversies, 10e, 0 2020 W. H. Freeman and Company
Figure 13.12 The density curve of a uniform distribution, for Exercise 13.11.
Observations from this distribution are spread "at random" between 0 and 5.
TF.13
The English proficiency test scores of the students from a large high school have mean μ = 76 points and standard deviation σ = 8.8 points. Let x̄ be the average salary of a random sample of 40 students.
a) Find the probability that x̄ is between 72 and 80, inclusive.
b) Find the probability that x̄ is at least 77.
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Chapter 6 Solutions
STAT TECH IN BUSINESS & ECON AC
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