Answered: The accompanying data came from a study… | bartleby

Algebra & Trigonometry with Analytic Geometry

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.8: Probability

Problem 19E

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The accompanying data came from a study of collusion in bidding within the construction industry.
No. Bidders
No. Contracts
2
8
20
4
26
5
17
6
12
8
8
5
6
10
2
11
A USE SALT
(a) What proportion of the contracts involved at most five bidders? At least five bidders? (Round your answers to four decimal places.)
at most five bidders
at least five bidders
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(b) What proportion of the contracts involved between five and 10 bidders, inclusive? Strictly between five and 10 bidders? (Round your answers to four decimal places
between five and 10 bidders, inclusive
strictly between five and 10 bidders
(c) Construct a histogram/bar chart.
30
30
25
25
20
20
15
15
10
10
5-
2 3 4 5 6 7 8 9 10 11
2 3 4 5 6 7 8 9 10 11
Number of bidders
Number of bidders
30아
30
25
25
20
20
15
15
10
10
5
5
2:35 PM
ENG
2/23/2022
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Frequency
Frequency
Frequency
Frequency

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Erythropoietin (EPO) is a banned drug used by athletes to increase the oxygen-carrying capacity of their blood. New tests for EPO were first introduced prior to the 2000 Olympic Games held in Sydney, Australia. Chance (Spring 2004) reported that of a sample of 830 world-class athletes, 159 did not compete in the 1999 World Championships (a year prior to the new EPO test). Similarly, 133 of 825 potential athletes did not compete in the 2000 Olympic Games. Use a 90% confidence interval to compare the two proportions. Was the new test effective in deterring an athlete’s participation in the 2000 Olympics? Use the CI information to make your conclusion
Erythropoietin (EPO) is a banned drug used by athletes to increase the oxygen-carrying capacity of their blood. New tests for EPO were first introduced prior to the 2000 Olympic Games held in Sydney, Australia. Chance (Spring 2004) reported that of a sample of 830 world-class athletes, 159 did not compete in the 1999 World Championships (a year prior to the new EPO test). Similarly, 133 of 825 potential athletes did not compete in the 2000 Olympic Games. Was the new test effective in deterring an athlete’s participation in the 2000 Olympics? If so, then the proportion of nonparticipating athletes in 2000 will be greater than the proportion of nonparticipating athletes in 1999. Use a 98% confidence interval to compare the two proportions and make the proper conclusion.

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