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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6.4 The duration of customer service calls to an insurance
company is normally distributed, with mean 20 minutes, and standard
deviation 5 minutes. For the following sample sizes, construct a
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(b) n = 100
(c) n = 400
(d) For each of the confidence intervals above, calculate and
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(e) Refer to part (d) above. Describe the relationship between
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departments. The company allocates service departmental costs to
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for these departments for last year are as follows: Service
Departments Operating Departments Personnel Maintenance Assembly
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Number of employees 35 30 90 60 Machine-hours 0 0 330 170 Personnel
costs are allocated first on the basis of number of employees and
Maintenance costs are allocated second on the...
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
operating departments using the step-down method. Operating data
for these departments for last year are as follows:
Service Departments
Operating Departments
Personnel
Maintenance
Assembly
Machining
Departmental costs
$144,000
$84,000
$12,000
$34,000
Number of employees
35
30
90
60
Machine-hours
0
0
210
290
Personnel costs are allocated first on the basis of number of
employees and Maintenance costs are allocated second on the...
Consider the two variables service quality and customer satisfaction. Service quality is independent variable and customer...
Consider the two variables service quality and customer
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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
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...
Consider the two variables service quality and customer
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
SERVICE QUALITY
CUSTOMER SATISFACTION
11
13
34
21
41
45
35
75
61
67
72
76
57
95
62
114
61
94
41
54
55
44...
A customer service operator receives, on average, 6 calls per week asking for assistance. a. What...
A customer service operator receives, on average, 6
calls per week asking for assistance.
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b. For any randomly selected week, find the probability that the
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i) at least 6 calls
ii) 4 or more calls
iii) At most 5 calls.
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The Merchant Manufacturing Company has two service departments — purchasing and maintenance, and two production departments...
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FROM
TO
Purchasing
Maintenance
Fabrication
Assembly
Purchasing
0
%
15
%
75
%
10
%
Maintenance
55
%
0
%
35
%
10
%
The direct operating costs of the departments (including both
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$
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Maintenance
78,000
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Percentage Service Provided to
Department
Cost
S1
S2
P1
P2
Service 1 (S1)
$
30,000
0
%
30
%
35
%
35
%
Service 2 (S2)
20,000
20
0
20
60
Production 1 (P1)
100,000
Production 2 (P2)
150,000
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The direct costs of each department for the last year is as
follows:
Administration $
80,000
Maintenance 60,000
Department
A 5,000
Department
B 20,000
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User Departments
Administration
Maintenance
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Dept. B
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10%
60%
30%
Maintenance
30%
20%
50%
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a.
$24,000...
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