7.24. A personnel agency is comparing salaries of uncertified accountants versus CPAs. Among recent accountants that they placed, 4 were uncertified while 6 were CPAS. The annual salaries (in dollars) are summarized in the following table: a. Calculate a 95% confidence interval for the difference between average salaries of uncertified accountants and CPAs.
7.24. A personnel agency is comparing salaries of uncertified accountants versus CPAs. Among recent accountants that they placed, 4 were uncertified while 6 were CPAS. The annual salaries (in dollars) are summarized in the following table: a. Calculate a 95% confidence interval for the difference between average salaries of uncertified accountants and CPAs.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
![A
a random sample is needed to
construct a 99% interval for the true average sale volume with a margin of error equal to 1?
7.24. A personnel agency is comparing salaries of uncertified accountants versus CPAs. Among
recent accountants that they placed, 4 were uncertified while 6 were CPAS. The annual salaries
(in dollars) are summarized in the following table:
a. Calculate a 95% confidence interval for the difference between average salaries of uncertified
accountants and CPAs.
CHAPTER 7. CONFIDENCE INTERVALS
&
7
b. Interpret the interval in part a.
c. Is there a difference between average salaries of uncertified accountants versus CPAS?
MacBook Pro
W
U
PDFJ
7.25. A clothing company wanted to compare the service satisfaction of two of their retail stores.
Customers were asked to rate the service they received on a scale of 1 to 10. A survey was
conducted on 150 customers visiting their NYC store, who recorded an average rating of 7.4
with a standard deviation of 1.3. The similar survey was conducted on 200 customers visiting
their Chicago store, yielding an average rating of 8.2 and a standard deviation of 1.8. Develop
K< 126
/ 186 > >
122%
*
8
O
0
Average
SD
Sample Size
Table 7.6: Annual Salaries
(
9
< ....
Uncertified CPA
0
$48,500 $56,600
$8,700 $9,100
4
6
)
0
P
F
{
[
+ 11
121
Q
88
2023-0...20.52 PM
}
]
delete
-
A
***
****
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Transcribed Image Text:A
a random sample is needed to
construct a 99% interval for the true average sale volume with a margin of error equal to 1?
7.24. A personnel agency is comparing salaries of uncertified accountants versus CPAs. Among
recent accountants that they placed, 4 were uncertified while 6 were CPAS. The annual salaries
(in dollars) are summarized in the following table:
a. Calculate a 95% confidence interval for the difference between average salaries of uncertified
accountants and CPAs.
CHAPTER 7. CONFIDENCE INTERVALS
&
7
b. Interpret the interval in part a.
c. Is there a difference between average salaries of uncertified accountants versus CPAS?
MacBook Pro
W
U
PDFJ
7.25. A clothing company wanted to compare the service satisfaction of two of their retail stores.
Customers were asked to rate the service they received on a scale of 1 to 10. A survey was
conducted on 150 customers visiting their NYC store, who recorded an average rating of 7.4
with a standard deviation of 1.3. The similar survey was conducted on 200 customers visiting
their Chicago store, yielding an average rating of 8.2 and a standard deviation of 1.8. Develop
K< 126
/ 186 > >
122%
*
8
O
0
Average
SD
Sample Size
Table 7.6: Annual Salaries
(
9
< ....
Uncertified CPA
0
$48,500 $56,600
$8,700 $9,100
4
6
)
0
P
F
{
[
+ 11
121
Q
88
2023-0...20.52 PM
}
]
delete
-
A
***
****
PR
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