Essentials of Statistics Books a la carte Plus NEW MyLab Statistics with Pearson eText - Access Card Package (5th Edition)
5th Edition
ISBN: 9780133892697
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 5, Problem 5CRE
Random Digits The digits 0, 1, 2,3,4, 5,6,7, 8, and 9 are randomly selected for applications in including the selection of lottery numbers and the selection of telephone numbers to be called as part of a survey. In the following tables, the table at the left summarizes actual results from 100 randomly selected digits, and the table at the right summarizes the
| Digit | Frequency |
| 0 | 9 |
| 1 | 7 |
| 2 | 12 |
| 3 | 10 |
| 4 | 10 |
| 5 | 11 |
| 6 | 8 |
| 7 | 8 |
| 8 | 14 |
| 9 | 11 |
| Digit x | P(x) |
| 0 | 0.1 |
| 1 | 0.1 |
| 2 | 0.1 |
| 3 | 0.1 |
| 4 | 0.1 |
| 5 | 0.1 |
| 6 | 0.1 |
| 7 | 0.1 |
| 8 | 0.1 |
| 9 | 0.1 |
- a. What is the table at the left called? b. What is the table at the right called?
- b. Use the table at the left to find the
mean . Is the result a statistic or a parameter? - c. Use the table at the right to find the mean. Is the result a statistic or a parameter?
- d. If you were to randomly generate 1000 such digits, would you expect the mean of these 1000 digits to be dose to the result from part (c) or part (d)? Why?
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Throughout, A, B, (An, n≥ 1), and (Bn, n≥ 1) are subsets of 2.
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AAB (ANB) U (BA) = (AUB) (AB),
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{A₁ U A2} A {B₁ U B2) C (A1 A B₁}U{A2 A B2).
16. Show that, if X and Y are independent random variables, such that E|X|< ∞,
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Chapter 5 Solutions
Essentials of Statistics Books a la carte Plus NEW MyLab Statistics with Pearson eText - Access Card Package (5th Edition)
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