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Help with provided questions, thank you. ADM Question 3: Listed...
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ADM
Question 3:
Listed below are the ages ( years) of randomly selected race car drivers (based on data reported in
USA Today). Construct a 98% confidence interval estimate of the mean age of all race car drivers,
assuming the sample data is normally distributed. Round to the nearest tenth. Interpret your result.
32
32 33 33
1 29 38 32
33
23
27
45
52
29
25
Question 4:
The values listed below are waiting times (in minutes) of customers at the Jefferson Valley
Bank, where customers enter a single waiting line that feeds three teller windows. Construct a
95% confidence interval for the population standard deviation o.
6.5 6.6 6.7 6.8 7.1 7.3
.3 7.4 7.7 7.7 7.7
The values listed below are waiting times (in minutes) of customers at the Bank of Providence,
where customers may enter any one of three different lines that have formed at three teller
windows. Construct a 95% confidence interval for the population standard deviation o.
4.2 5.4 5.8 6.2 6.7 7.7 7.7 8.5 9.3 10.0
Interpret the results found in parts (a) and (b). Do the confidence intervals suggest a difference
in the variation among waiting times? Which arrangement seems better: the single-line system
or the multiple-line system?
Help with provided questions, thank you
Answer & Explanation
Solved by verified expertAnswered by john_doe_740 on coursehero.com
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