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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 Bank B 6.3 6.6 6.7 6.8 7.1 7.3 7.5 7.7 7.7 7.7 5.5 5.8 6.3 6.8 7.7 7.7 8.4 9.4 10.0 4.1 E Click the icon to view the table of Chi-Square critical values. Construct a 99% confidence interval for the population standard deviation o at Bank A. min < OBank A

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 Bank B 6.3 6.6 6.7 6.8 7.1 7.3 7.5 7.7 7.7 7.7 5.5 5.8 6.3 6.8 7.7 7.7 8.4 9.4 10.0 4.1 E Click the icon to view the table of Chi-Square critical values. Construct a 99% confidence interval for the population standard deviation o at Bank A. min < OBank A

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 Waiting Times (minutes):** - 6.3 - 6.6 - 6.7 - 6.8 - 7.1 - 7.3 - 7.5 - 7.7 - 7.7 - 7.7 **Bank B Waiting Times (minutes):** - 4.1 - 5.5 - 5.8 - 6.3 - 6.8 - 7.7 - 7.7 - 8.4 - 9.4 - 10.0 **Instructions:** Click the icon to view the table of Chi-Square critical values. Construct a 99% confidence interval for the population standard deviation \( \sigma \) at Bank A. \[ \text{min} < \sigma_{\text{Bank A}} < \text{min} \] (Round to two decimal places as needed.)
Transcribed Image Text: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 Waiting Times (minutes):** - 6.3 - 6.6 - 6.7 - 6.8 - 7.1 - 7.3 - 7.5 - 7.7 - 7.7 - 7.7 **Bank B Waiting Times (minutes):** - 4.1 - 5.5 - 5.8 - 6.3 - 6.8 - 7.7 - 7.7 - 8.4 - 9.4 - 10.0 **Instructions:** Click the icon to view the table of Chi-Square critical values. Construct a 99% confidence interval for the population standard deviation \( \sigma \) at Bank A. \[ \text{min} < \sigma_{\text{Bank A}} < \text{min} \] (Round to two decimal places as needed.)
Expert Solution
Step 1

 

Obtain the 99% confidence interval for the population standard deviation at Bank A.

 

The 99% confidence interval for the population standard deviation at Bank A is obtained below as follows:

 

Use EXCEL Procedure for finding the value of sample variance.

 

Follow the instruction to obtain the value of sample variance.

 

  1. Open EXCEL
  2. Go to Formula bar.
  3. In formula bar enter the function as“=VAR”
  4. Enter the range as $A$1:$A$11.
  5. Click enter.

 

EXCEL output:

 

From the EXCEL output, the value of the variance is 0.2671

 

Thus, the value of variance is 0.2671.

 

The degrees of freedom is,

Statistics homework question answer, step 1, image 1

Thus, the degrees of freedom is 9.

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