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Construct a 99% confidence interval for the population standard devViation o at Bank A.

Construct a 99% confidence interval for the population standard devViation o at Bank A.

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter4: Writing Linear Equations
Section: Chapter Questions
Problem 14CR
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### Comparing Waiting Times at Two Banks The following data represents waiting times (in minutes) for customers at two different banks. #### Bank A - Waiting times: 6.3, 6.6, 6.7, 6.8, 7.1, 7.2, 7.5, 7.9, 7.9, 7.9 #### Bank B - Waiting times: 4.3, 5.4, 5.8, 6.1, 6.7, 7.6, 7.6, 8.4, 9.3, 10.0 **Setup:** - At Bank A: Customers join a single line that feeds three teller windows. - At Bank B: Customers can choose from three separate lines, each leading to one of the three teller windows. **Analysis Task:** - Construct a 99% confidence interval for the population standard deviation (\(\sigma\)) at Bank A. **Instructions:** - Use the Chi-Square critical values table to help determine the interval. - Enter the confidence interval in the format: \(\text{min} < \sigma_{\text{Bank A}} < \text{min}\) - Round your answers to two decimal places. For further guidance, please refer to the help section located at the bottom of the page.
Transcribed Image Text:### Comparing Waiting Times at Two Banks The following data represents waiting times (in minutes) for customers at two different banks. #### Bank A - Waiting times: 6.3, 6.6, 6.7, 6.8, 7.1, 7.2, 7.5, 7.9, 7.9, 7.9 #### Bank B - Waiting times: 4.3, 5.4, 5.8, 6.1, 6.7, 7.6, 7.6, 8.4, 9.3, 10.0 **Setup:** - At Bank A: Customers join a single line that feeds three teller windows. - At Bank B: Customers can choose from three separate lines, each leading to one of the three teller windows. **Analysis Task:** - Construct a 99% confidence interval for the population standard deviation (\(\sigma\)) at Bank A. **Instructions:** - Use the Chi-Square critical values table to help determine the interval. - Enter the confidence interval in the format: \(\text{min} < \sigma_{\text{Bank A}} < \text{min}\) - Round your answers to two decimal places. For further guidance, please refer to the help section located at the bottom of the page.
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