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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Textbook Question
Chapter 5, Problem 10CQQ
In Exercises 6–10, use the following: Five American Airlines flights are randomly selected, and the table in the margin lists the
x | p(x) |
0 | 0+ |
1 | 0.006 |
2 | 0.051 |
3 | 0.205 |
4 | 0.409 |
5 | 0.338 |
10. Is 5 an unusually high number of flights arriving on time?
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For Exercises 27–30, calculate the (a) range, (b) arithmetic mean, and (c) variance, and
(d) interpret the statistics.
Question
A nurse, who works at a maternity ward, is having a debate with another nurse about the birth weights of twins. She
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disagreed. Rita decided to use statistics to prove her theory by randomly selecting 6 sets of twins who had been born at the
hospital recently and recording the weights of both newborns. The results (in pounds) are shown in the table below.
Note: d (First-born twin
=
Second-born twin)
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6.72
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6.36
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6.41
6.10
5.51
5.37
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5.68
5.63
Assume that both of the populations are normally distributed. At the 0.10 level of significance, is there sufficient evidence
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Find the test statistic, to. Round your answer to the nearest hundredth.
Use the following table for the next two questions. The following data represent the number of male and female
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180
1010
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(a) 1.0222
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1110
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(e) 0.0450
24. Given that the selected student is female, find the probability that the student is a nursing major?
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(a) 0.0380
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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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