A bank with a branch located in a commercial district of a city has the business objective of improving the process for serving customers during the noon-to-1 PM lunch period. To do so, the waiting time (defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window) needs to be shortened to increase customer satisfaction. Another bank in the area is also concerned with the noon-to-1 PM lunch period. A random sample of 12 customers is selected from each bank and the waiting times are the following: Bank 1: 4.23 3.62 3.96 4.85 4.68 3.55 4.21 3.25 4.19 4.53 4.03 Bank 2: 4.06 3.83 1.37 4.04 2.39 2.71 1.38 3.49 4.77 4.49 1.15 |1.05 Click here for the Excel Data File. Data file should open in a new browswer window. Select "File" then "Save As" to download the file to your computer and be able to use it in Excel. Is there evidence of a difference in the variability of the waiting time between the two branches? (alpha = 0.01) a. What are the null and alternate hypotheses? Ho: (Click to select) v H1: (Click to select) v |(Click to select) v |(Click to select) v |(Click to select) v |(Click to select) v b. What is the level of significance? (Round your answer to 2 decimal places.) c. Compute the value of the test statistic? sign in front of them) (Round your answer to 2 decimal places. Negative values should have a minus d. Determine the p-value (Round your final answer to 4 decimal places.)
A bank with a branch located in a commercial district of a city has the business objective of improving the process for serving customers during the noon-to-1 PM lunch period. To do so, the waiting time (defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window) needs to be shortened to increase customer satisfaction. Another bank in the area is also concerned with the noon-to-1 PM lunch period. A random sample of 12 customers is selected from each bank and the waiting times are the following: Bank 1: 4.23 3.62 3.96 4.85 4.68 3.55 4.21 3.25 4.19 4.53 4.03 Bank 2: 4.06 3.83 1.37 4.04 2.39 2.71 1.38 3.49 4.77 4.49 1.15 |1.05 Click here for the Excel Data File. Data file should open in a new browswer window. Select "File" then "Save As" to download the file to your computer and be able to use it in Excel. Is there evidence of a difference in the variability of the waiting time between the two branches? (alpha = 0.01) a. What are the null and alternate hypotheses? Ho: (Click to select) v H1: (Click to select) v |(Click to select) v |(Click to select) v |(Click to select) v |(Click to select) v b. What is the level of significance? (Round your answer to 2 decimal places.) c. Compute the value of the test statistic? sign in front of them) (Round your answer to 2 decimal places. Negative values should have a minus d. Determine the p-value (Round your final answer to 4 decimal places.)
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 28EQ
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Transcribed Image Text:e. What is your decision regarding the null hypothesis?
O Fail to reject the null.
Reject the null.
f. Interpret the result.
Transcribed Image Text:A bank with a branch located in a commercial district of a city has the business objective of improving the process for serving
customers during the noon-to-1 PM lunch period. To do so, the waiting time (defined as the number of minutes that elapses from when
the customer enters the line until he or she reaches the teller window) needs to be shortened to increase customer satisfaction.
Another bank in the area is also concerned with the noon-to-1 PM lunch period. A random sample of 12 customers is selected from
each bank and the waiting times are the following:
Bank 1:
4.23
3.62
4.53
3
3.96
4.85
4.68
3.55
4.21
3.25
4.19
4.03
Bank 2:
4.06
3.83
1.37
4.04
2.39
2.71
1.38
4.49
3.49
4.77
1.15
1.05
Click here for the Excel Data File. Data file should open in a new browswer window. Select "File" then "Save As" to download the file to
your computer and be able to use it in Excel.
Is there evidence of a difference in the variability of the waiting time between the two branches? (alpha = 0.01)
a. What are the null and alternate hypotheses? '.
Ho: (Click to select) v (Click to select) v
H1: (Click to select) v (Click to select) v
|(Click to select) v
|(Click to select) v
b. What is the level of significance?
(Round your answer to 2 decimal places.)
c. Compute the value of the test statistic?
sign in front of them)
(Round your answer to 2 decimal places. Negative values should have a minus
d. Determine the p-value
(Round your final answer to 4 decimal places.)
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