The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions. Bank A6.46.66.76.87.17.37.67.97.97.9Bank B4.15.35.96.26.77.77.78.49.410.0 Click the icon to view the table of Chi-Square critical values. Construct a 90% confidence interval for the population standard deviation sigma at Bank A. (answer) min less than sigma Bank A less than (answer) min Construct a 90% confidence interval for the population standard deviation sigma at Bank B. (answer) min less than sigma Bank B less than (answer) min
The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that have formed at three teller windows. Answer the following questions.
Bank A
6.4
6.6
6.7
6.8
7.1
7.3
7.6
7.9
7.9
7.9
Bank B
4.1
5.3
5.9
6.2
6.7
7.7
7.7
8.4
9.4
10.0
Click the icon to view the table of Chi-Square critical values.
Construct a 90% confidence interval for the population standard deviation sigma at Bank A.
(answer) min less than sigma Bank A less than (answer) min
Construct a 90% confidence interval for the population standard deviation sigma at Bank B.
(answer) min less than sigma Bank B less than (answer) min
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