Essentials of Statistics Plus MyLab Statistics with Pearson eText - Access Card Package (5th Edition)
5th Edition
ISBN: 9780133864960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 5, Problem 6RE
In Exercises 5 and 6, refer to the table in die margin. The random variable x is the number of males with tinnitus (ringing ears) among four randomly selected males (based on data from “Prevalence and Characteristics of Tinnitus among US Adults” by Shargorodsky et al., American Journal of Medicine, Vol. 123, No. 8).
6. Tinnitus Find the
| x | p(x) |
| 0 | 0.674 |
| 1 | 0.280 |
| 2 | 0.044 |
| 3 | 0.003 |
| 4 | 0+ |
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Excel File: data05-19.xls
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a. Is this probability distribution valid?
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f(x)
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Select your answer
Select your answer
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For unemployed persons in the United States, the average number of months of unemployment at the end of December 2009 was approximately seven months (Bureau of Labor Statistics, January 2010). Suppose the following data are for a particular region in upstate New York. The values in the first column show the number of
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Months
Unemployed
Number
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1
1029
2
1686
3
2269
4
2675
5
3487
6
4652
7
4145
8
3587
9
2325
10
1120
Let x be a random variable indicating the number of months a person is unemployed.
a. Use the data to develop an empirical discrete probability distribution for x (to 4 decimals).
(x)
f(x)
1
2
3
4
5
6
7
8
9
10
b. Show that your probability distribution satisfies the conditions for a valid discrete probability distribution.
The input in the box below will not be graded, but may be reviewed and considered by your instructor.
c. What is the probability that a person…
Chapter 5 Solutions
Essentials of Statistics Plus MyLab Statistics with Pearson eText - Access Card Package (5th Edition)
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