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 2.1 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 0.01. Complete parts (a) through (d) below. A Click on the icon to view the data. a. Identify the null and alternative hypotheses. Choose the correct answer below. Customer Waiting Times O A. Ho: a22.1 minutes HA: G<2.1 minutes O B. Ho: a=2.1 minutes HA: G2.1 minutes Customer Waiting Times OC. Ho: a<2.1 minutes Ha: 0=2.1 minutes O D. Ho: 0 = 2.1 minutes (in minutes) EG 7 148 HA:o<2.1 minutes
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 2.1 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 0.01. Complete parts (a) through (d) below. A Click on the icon to view the data. a. Identify the null and alternative hypotheses. Choose the correct answer below. Customer Waiting Times O A. Ho: a22.1 minutes HA: G<2.1 minutes O B. Ho: a=2.1 minutes HA: G2.1 minutes Customer Waiting Times OC. Ho: a<2.1 minutes Ha: 0=2.1 minutes O D. Ho: 0 = 2.1 minutes (in minutes) EG 7 148 HA:o<2.1 minutes
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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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 2.1 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 0.01. Complete parts (a) through (d) below.
E Click on the icon to view the data.
....
a. Identify the null and alternative hypotheses. Choose the correct answer below.
Customer Waiting Times
O A. Ho: o2 2.1 minutes
O B. Ho: 0 =2.1 minutes
HẠ: o<2.1 minutes
HA: 0 2.1 minutes
O C. Ho: o<2.1 minutes
O D. Ho: o = 2.1 minutes
Customer Waiting Times
(in minutes)
HA: 0= 2.1 minutes
HA: o<2.1 minutes
6.6
6.7
14.8
7.6
7.3
6.2
6.6
7.7
b. Compute the test statistic.
6.4
6.4
8.5
7.3
7.6
6.3
7.6
6.5
10.6
6.6
7.2
12.2
7.6
7.3
6.1
7.8
(Round to two decimal places as needed.)
6.6
5.5
7.8
6.1
8.9
c. Find the P-value of the test statistic.
6.4
7.5
6.7
8.4
7.2
7.7
6.7
The P-value of the test statistic is
7.3
7.3
8.1
7.9
(Round to three decimal places as needed.)
8.2
6.4
8.6
6.9
7.1
7.7
8.8
7.7
d. Does the use of the single line appear to reduce the variation among waiting times?
4.9
6.1
6.9
7.4
6.1
6.7
7.6
6.1
There
v sufficient evidence to conclude that the single line reduced the variation among waiting times because H, is
|by the hypothesis test.
6.1
6.1
6.2
6.1
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