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 7.5 7.8 7.8 7.8 Bank B 4.2 5.5 5.8 6.2 6.7 7.7 7.7 8.5 9.3 10.0 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.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
icon
Concept explainers
Question

And bank B

### Analysis of Customer Waiting Times at Two Different Banks

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. 

Below are the collected waiting times for each bank:

#### Waiting Times
| Time (mins)  | Bank A | Bank B |
|:------------:|:------:|:------:|
| **Value 1**  |  6.4   |  4.2   |
| **Value 2**  |  6.6   |  5.5   |
| **Value 3**  |  6.7   |  5.8   |
| **Value 4**  |  6.8   |  6.2   |
| **Value 5**  |  7.1   |  6.0   |
| **Value 6**  |  7.3   |  7.7   |
| **Value 7**  |  7.5   |  7.7   |
| **Value 8**  |  7.8   |  8.5   |
| **Value 9**  |  7.8   |  9.3   |
| **Value 10** |  7.8   | 10.0   |

#### Task

1. **Confidence Interval for Standard Deviation at Bank A:**
   Construct a 99% confidence interval for the population standard deviation \(\sigma\) at Bank A.

#### Steps

- Click the icon to view the table of Chi-Square critical values.
- Use the given waiting times to calculate the confidence interval.

#### Calculation Template

\[
\text{min} < \sigma_{\text{Bank A}} < \text{min}
\]

*(Round to two decimal places as needed.)* 

This information assists in understanding the differences in service efficiency between the two banks and helps to improve operational strategies.
Transcribed Image Text:### Analysis of Customer Waiting Times at Two Different Banks 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. Below are the collected waiting times for each bank: #### Waiting Times | Time (mins) | Bank A | Bank B | |:------------:|:------:|:------:| | **Value 1** | 6.4 | 4.2 | | **Value 2** | 6.6 | 5.5 | | **Value 3** | 6.7 | 5.8 | | **Value 4** | 6.8 | 6.2 | | **Value 5** | 7.1 | 6.0 | | **Value 6** | 7.3 | 7.7 | | **Value 7** | 7.5 | 7.7 | | **Value 8** | 7.8 | 8.5 | | **Value 9** | 7.8 | 9.3 | | **Value 10** | 7.8 | 10.0 | #### Task 1. **Confidence Interval for Standard Deviation at Bank A:** Construct a 99% confidence interval for the population standard deviation \(\sigma\) at Bank A. #### Steps - Click the icon to view the table of Chi-Square critical values. - Use the given waiting times to calculate the confidence interval. #### Calculation Template \[ \text{min} < \sigma_{\text{Bank A}} < \text{min} \] *(Round to two decimal places as needed.)* This information assists in understanding the differences in service efficiency between the two banks and helps to improve operational strategies.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Points, Lines and Planes
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman