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 2.12.1 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 0.050.05. Complete parts (a) through (d) below. LOADING... Click on the icon to view the data. 7.9 6.4 7.3 6.7 7.3 6.4 6.9 7.1 8.3 6.2 6.3 7.2 8.8 6.1 8.9 7.5 7.5 7.6 6.1 7.6 7.3 7.7 7.9 10.1 7.1 6.1 6.5 6.6 6.7 6.9 6.6 6.8 6.9 14.6 6.6 7.2 7.7 7.5 7.6 6.3 13.9 7.2 8.7 7.5 6.1 6.3 7.4 6.1 6.7 6.3 9.1 8.3 6.4 7.9 7.5 8.5 7.8 6.3 6.5 6.5   a. Identify the null and alternative hypotheses. Choose the correct answer below.     A. Upper H 0 : sigma greater than or equals 2.1H0: σ≥2.1 minutes Upper H Subscript Upper A Baseline : sigma less than 2.1HA: σ<2.1 minutes   B. Upper H 0 : sigma equals 2.1H0: σ=2.1 minutes Upper H Subscript Upper A Baseline : sigma not equals 2.1HA: σ≠2.1 minutes   C. Upper H 0 : sigma equals 2.1H0: σ=2.1 minutes Upper H Subscript Upper A Baseline : sigma less than 2.1HA: σ<2.1 minutes Your answer is correct.   D. Upper H 0 : sigma less than 2.1H0: σ<2.1 minutes Upper H Subscript Upper A Baseline : sigma equals 2.1HA: σ=2.1 minutes b. Compute the test statistic.   chi squaredχ2equals=??? (Round to two decimal places as needed.)

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6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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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
2.12.1
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
0.050.05.
Complete parts (a) through (d) below.
LOADING...
Click on the icon to view the data.
7.9
6.4
7.3
6.7
7.3
6.4
6.9
7.1
8.3
6.2
6.3
7.2
8.8
6.1
8.9
7.5
7.5
7.6
6.1
7.6
7.3
7.7
7.9
10.1
7.1
6.1
6.5
6.6
6.7
6.9
6.6
6.8
6.9
14.6
6.6
7.2
7.7
7.5
7.6
6.3
13.9
7.2
8.7
7.5
6.1
6.3
7.4
6.1
6.7
6.3
9.1
8.3
6.4
7.9
7.5
8.5
7.8
6.3
6.5
6.5
 
a. Identify the null and alternative hypotheses. Choose the correct answer below.
 
 
A.
Upper H 0 : sigma greater than or equals 2.1H0: σ≥2.1
minutes
Upper H Subscript Upper A Baseline : sigma less than 2.1HA: σ<2.1
minutes
 
B.
Upper H 0 : sigma equals 2.1H0: σ=2.1
minutes
Upper H Subscript Upper A Baseline : sigma not equals 2.1HA: σ≠2.1
minutes
 
C.
Upper H 0 : sigma equals 2.1H0: σ=2.1
minutes
Upper H Subscript Upper A Baseline : sigma less than 2.1HA: σ<2.1
minutes
Your answer is correct.
 
D.
Upper H 0 : sigma less than 2.1H0: σ<2.1
minutes
Upper H Subscript Upper A Baseline : sigma equals 2.1HA: σ=2.1
minutes
b. Compute the test statistic.
 
chi squaredχ2equals=???
(Round to two decimal places as needed.)
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