Weightlifting Injuries. Resistance training is a popular form of condition enhancing sports performance and is widely used among high ing aimed at school, college, and professional athletes, although its use for is controversial. A random sample of 4111 patients aged 8-30 admitted to younger athletes U.S. emergency rooms with the Consumer Product Safety Commission code "weightlifting" were obtained. These injuries were classified as "accidental" if caused by dropped weight or improper equipment use. Of the 4111 weight- lifting injuries, 1552 were classified as accidental.0 Give a 90% confidence interval for the proportion of weightlifting injuries in this age group that were accidental. Follow the four-step process as illustrated in Example 22.4.

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Chapter11: Data Analysis And Probability
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22.6 is what needs answerd the other is just what goes with it please use calculator method use a ti83 or 84 to answer please

nlu in with landline
As the of a large our confidence
erence about a Population Proportion
EXAMPLE 22.4 Estimating Risky Behavior
The four-step process for any confidence interval is outlined on page 323
adult heterosexuals had had multiple partners. That is,
170
0.0636
2673
What can we say about the population of all adult heterosexuals?
PLAN We will give a 99% confidence interval to estimate the proportion o cf a
adult heterosexuals who have multiple partners.
SOLVE First verify the conditions for inference:
The sampling design was a complex stratified sample, and the survey vsen
irference prccedures for that design. The overall effect is close to an SRS, however
•The sample is large enough: the numbers of successes (170) and failures (2503)
in the sample are both much larger than 15.
The sample size condition is easily satisfied. The condition that the sample be an SRS
is only approximately met.
A 99% confidence interval for the proportion p of all adult heterosexuals with multiple
partners uses the standard Normal critical value z* = 2.576. The confidence interval is
%3D
(0.0636)(0.9364)
3D0.0636± 2.576
2673
3D0.0636+ 0.0122
= 0.0514 to 0.0758
%3D
CONCLUDE: We are 99% confident that the percent of adult heterosexuals who
nave had more than one sexual partner in the year prior to the survey lies beme
about 5.1% and 7.6%.
weaken our confidence
As usual, the practical problems of a large sample sUrvey
in the AIDS suruey's conclusions
people in
%98
S Nd
Transcribed Image Text:nlu in with landline As the of a large our confidence erence about a Population Proportion EXAMPLE 22.4 Estimating Risky Behavior The four-step process for any confidence interval is outlined on page 323 adult heterosexuals had had multiple partners. That is, 170 0.0636 2673 What can we say about the population of all adult heterosexuals? PLAN We will give a 99% confidence interval to estimate the proportion o cf a adult heterosexuals who have multiple partners. SOLVE First verify the conditions for inference: The sampling design was a complex stratified sample, and the survey vsen irference prccedures for that design. The overall effect is close to an SRS, however •The sample is large enough: the numbers of successes (170) and failures (2503) in the sample are both much larger than 15. The sample size condition is easily satisfied. The condition that the sample be an SRS is only approximately met. A 99% confidence interval for the proportion p of all adult heterosexuals with multiple partners uses the standard Normal critical value z* = 2.576. The confidence interval is %3D (0.0636)(0.9364) 3D0.0636± 2.576 2673 3D0.0636+ 0.0122 = 0.0514 to 0.0758 %3D CONCLUDE: We are 99% confident that the percent of adult heterosexuals who nave had more than one sexual partner in the year prior to the survey lies beme about 5.1% and 7.6%. weaken our confidence As usual, the practical problems of a large sample sUrvey in the AIDS suruey's conclusions people in %98 S Nd
school, college,
22.6 Weightlifting Injuries. Resistance training is a popular form of condition
d aimed at enhancing sports performance and is widely used among high
school, college, and professional athletes, although its use for
is controversial. A randomn sample of 4111 patients aged 8-30 admitted to
4+
younger athletes
U.S. emergency rooms with the Consumer Product Safety Commission code
"weightlifting" were obtained. These injuries were classified as “accidental" if
caused by dropped weight or improper equipment use. Of the 4111 weight-
lifting injuries, 1552 were classified as accidental.10 Give a 90% confidence
interval for the proportion of weightlifting injuries in this age group that were
accidental. Follow the four-step process as illustrated in Example 22.4.
Transcribed Image Text:school, college, 22.6 Weightlifting Injuries. Resistance training is a popular form of condition d aimed at enhancing sports performance and is widely used among high school, college, and professional athletes, although its use for is controversial. A randomn sample of 4111 patients aged 8-30 admitted to 4+ younger athletes U.S. emergency rooms with the Consumer Product Safety Commission code "weightlifting" were obtained. These injuries were classified as “accidental" if caused by dropped weight or improper equipment use. Of the 4111 weight- lifting injuries, 1552 were classified as accidental.10 Give a 90% confidence interval for the proportion of weightlifting injuries in this age group that were accidental. Follow the four-step process as illustrated in Example 22.4.
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