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. Assume that the sample is a simple random sample selected from a normally distributed population. a. Compute the test statistic. chi squared equals (Round to two decimal places as needed.) b. Find the P-value of the test statistic. The P-value of the test statistic is (Round to three decimal places as needed.)
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. Assume that the sample is a simple random sample selected from a normally distributed population. a. Compute the test statistic. chi squared equals (Round to two decimal places as needed.) b. Find the P-value of the test statistic. The P-value of the test statistic is (Round to three decimal places as needed.)
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 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. Assume that the sample is a simple random sample selected from a
a. Compute the test statistic.
chi squared equals
(Round to two decimal places as needed.)
b. Find the P-value of the test statistic.
The P-value of the test statistic is
(Round to three decimal places as needed.)
Transcribed Image Text:**Customer Waiting Times (in minutes)**
| 7.7 | 6.8 | 8.4 | 7.8 |
|-----|-----|-----|-----|
| 6.9 | 7.8 | 7.9 | 7.1 |
| 7.2 | 6.2 | 6.4 | 6.6 |
| 7.9 | 7.2 | 9.1 | 7.8 |
| 8.9 | 8.1 | 6.5 | 7.8 |
| 7.4 | 7.3 | 6.8 | 5.1 |
| 7.9 | 7.5 | 7.6 | 6.3 |
| 6.8 | 6.3 | 6.4 | 7.6 |
| 7.9 | 7.2 | 6.6 | 7.5 |
| 7.2 | 6.5 | 8.7 | 6.8 |
| 6.9 | 6.3 | 5.2 | 7.4 |
| 6.1 | 6.1 | 6.2 | 6.5 |
| 5.9 | 6.2 | 8.9 | 7.2 |
| 7.1 | 6.1 | 7.7 | 7.5 |
| 8.1 | 6.7 | 6.1 | 7.2 |
This table shows the customer waiting times recorded in minutes. The data is useful for analyzing service efficiency and determining areas for improvement to enhance customer satisfaction by reducing delays.
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