he data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard eviation of waiting times is less than 1.8 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller rindow. Use a significance level of 0.025. Complete parts (a) through (d) below. E Click on the icon to view the data.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
Section: Chapter Questions
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Compute the test statistic. 

X^2=

The data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard
deviation of waiting times is less than 1.8 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller
window. Use a significance level of 0.025. Complete parts (a) through (d) below.
Click on the icon to view the data.
Transcribed Image Text:The data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard deviation of waiting times is less than 1.8 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.025. Complete parts (a) through (d) below. Click on the icon to view the data.
Customer Waiting Times
(in minutes)
7.7
6.9
4.3
7.4
7.2
7.3
6.4
6.3
7.7
6.4
7.2
6.4
6.6
7.7
8.9
7.7
7.6
8.4
12.2
7.5
6.7
7.1
7.6
6.3
6.3
6.6
7.7
8.8
6.3
6.7
6.4
6.2
8.4
8.8
6.5
7.3
7.6
7.8
8.5
7.3
7.6
6.1
10.7
6.2
6.2
6.3
8.9
6.3
12.8
6.2
8.7
7.4
7.3
7.6
6.1
8.1
6.1
6.4
7.1
7.6
Transcribed Image Text:Customer Waiting Times (in minutes) 7.7 6.9 4.3 7.4 7.2 7.3 6.4 6.3 7.7 6.4 7.2 6.4 6.6 7.7 8.9 7.7 7.6 8.4 12.2 7.5 6.7 7.1 7.6 6.3 6.3 6.6 7.7 8.8 6.3 6.7 6.4 6.2 8.4 8.8 6.5 7.3 7.6 7.8 8.5 7.3 7.6 6.1 10.7 6.2 6.2 6.3 8.9 6.3 12.8 6.2 8.7 7.4 7.3 7.6 6.1 8.1 6.1 6.4 7.1 7.6
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