Question
In: Statistics and Probability
A sample of calls made to the customer service departments at two publishers is taken, and...
A sample of calls made to the customer service departments at two publishers is taken, and the number of minutes spent on hold is recorded. Results are shown in the table. Both populations of hold-times are normally distributed.
|
Publisher C n=32 s= 4.5 min. |
Publisher D n= 28 s= 7.3 min. |
a. Use formula/chart to test the claim that the standard deviation in hold-time is the same at both publishers. Use 0.05 significance and the critical value method.
b. Use your calculator to find the P-value associated with the claim above.
c. With 0.05 significance, test the claim that the mean time spent on hold is shorter at Publisher C. Use the P-value method with formula & chart.
d. Use your calculator to construct a 99% confidence interval estimate for the mean difference between hold-times at the two publishers.
Solutions
orchestra answered 2 years agoRelated Solutions
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for these departments for last year are as follows: Service
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Andy Corp. has two service departments and two operating departments. The company allocates service departmental costs...
Andy Corp. has two service departments and two operating
departments. The company allocates service departmental costs to
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Service Departments
Operating Departments
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$12,000
$34,000
Number of employees
35
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Machine-hours
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210
290
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PLEASE USE SPSS ONLY AND PASTE THE OUTPUT OF SPSS. DO NOT USE
EXCEL OR ANY OTHER SOFTWARE. SPSS ONLY PLEASE.
SERVICE QUALITY
CUSTOMER SATISFACTION
2
1
3
2
4
4
5
7
6
6
7
7
8
9
6
11
6
9
4
5
5
4
6
7
2
3...
Consider the two variables service quality and customer satisfaction. Service quality is independent variable and customer...
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satisfaction. Service quality is independent variable and customer
satisfaction is dependent variable. Perform regression analysis
using SPSS and explain the results. PLEASE USE SPSS ONLY AND PASTE
THE OUTPUT OF SPSS. DO NOT USE EXCEL OR ANY OTHER SOFTWARE. SPSS
ONLY PLEASE. SERVICE QUALITY CUSTOMER SATISFACTION
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CUSTOMER SATISFACTION
11
13
34
21
41
45
35
75
61
67
72
76
57
95
62
114
61
94
41
54
55
44...
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ii) 4 or more calls
iii) At most 5 calls.
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FROM
TO
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Maintenance
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Assembly
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0
%
15
%
75
%
10
%
Maintenance
55
%
0
%
35
%
10
%
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Percentage Service Provided to
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S2
P1
P2
Service 1 (S1)
$
30,000
0
%
30
%
35
%
35
%
Service 2 (S2)
20,000
20
0
20
60
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150,000
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A 5,000
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B 20,000
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Administration
Maintenance
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50%
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