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 differentlines that have formed at three teller windows. Answer the following questions.Bank A6.36.66.7Bank BA154586.863677.2767.5767.9847.9927.910.0DClick the icon to view the table of Chi-Square critical values.Construct a 99% confidence interval for the population standard deviation at Bank Amin

. . . tandard deviation o at Bank A. tandard deviation o at Bank B. confidence intervals suggest a difference in the variation among waiting times? Does the single-line system or the mult ith a multiple-line system. The single-line system appears to be better. ith a single line system. The single-line system appears to be better. th a single line system. The multiple-line system appears to be better. ith a multiple-line system. The multiple-line system appears to be better