1. QM 520 SP2025 V
2. Week Four: Confidence Interval Estimation
3. Quiz #2
Status Finished
Started Wednesday, April 23, 2025, 6:19 AM
Completed Wednesday, April 23, 2025, 7:35 AM
Duration 1 hour 15 mins
Grade 92.00 out of 100.00
Question 1
Correct
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Question text
Upon discovering an improperly adjusted drill press at end of the shift (the
setting gets checked at start and end of every shift), Jack Joyner, Director of
Quality Control, ordered a 100% inspection of all castings drilled on the evening
shift. Jack is ordering a __________.
Question 1Select one:
A.
sample of the castings
B.
sorting of the castings
C.
census of the castings
D.
statistic from the castings
Feedback
The correct answer is: census of the castings
Question 2
Correct
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Question text
5. The sampling error is the
Question 2Select one:
A.
same as standard error of the mean
B.
difference between the value of the sample mean and the value of the
population mean
C.
, error caused by selecting a bad sample
D.
standard deviation multiplied by sample size
E.
None of the above answers is correct
Feedback
The correct answer is: difference between the value of the sample mean and the
value of the population mean
Question 3
Correct
4.0 points out of 4.0
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Question text
Sue Taylor, Director of Global Industrial Sales, is concerned by a deteriorating
sales trend. Specifically, the number of customers is stable at 1,500, but they
are purchasing less each year. She orders her staff to search for causes of the
downward trend by selecting a focus group of 40 industrial customers. One
question asked the focus group customers to rate "Merchandise is delivered on
time" on a scale of 1 to 5, with 1 meaning "never" and 5 meaning "always". The
average response of the 40 customers to this question is a __________.
Question 3Select one:
A.
parameter
B.
population
C.
sample
D.
statistic
Feedback
The correct answer is: statistic
Question 4
Correct
4.0 points out of 4.0
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Question text
10. The absolute value of the difference between the point estimate and the
population parameter it estimates is the
Question 4Select one:
A.
standard error
B.
sampling error
2. Week Four: Confidence Interval Estimation
3. Quiz #2
Status Finished
Started Wednesday, April 23, 2025, 6:19 AM
Completed Wednesday, April 23, 2025, 7:35 AM
Duration 1 hour 15 mins
Grade 92.00 out of 100.00
Question 1
Correct
4.0 points out of 4.0
Flag question
Question text
Upon discovering an improperly adjusted drill press at end of the shift (the
setting gets checked at start and end of every shift), Jack Joyner, Director of
Quality Control, ordered a 100% inspection of all castings drilled on the evening
shift. Jack is ordering a __________.
Question 1Select one:
A.
sample of the castings
B.
sorting of the castings
C.
census of the castings
D.
statistic from the castings
Feedback
The correct answer is: census of the castings
Question 2
Correct
4.0 points out of 4.0
Flag question
Question text
5. The sampling error is the
Question 2Select one:
A.
same as standard error of the mean
B.
difference between the value of the sample mean and the value of the
population mean
C.
, error caused by selecting a bad sample
D.
standard deviation multiplied by sample size
E.
None of the above answers is correct
Feedback
The correct answer is: difference between the value of the sample mean and the
value of the population mean
Question 3
Correct
4.0 points out of 4.0
Flag question
Question text
Sue Taylor, Director of Global Industrial Sales, is concerned by a deteriorating
sales trend. Specifically, the number of customers is stable at 1,500, but they
are purchasing less each year. She orders her staff to search for causes of the
downward trend by selecting a focus group of 40 industrial customers. One
question asked the focus group customers to rate "Merchandise is delivered on
time" on a scale of 1 to 5, with 1 meaning "never" and 5 meaning "always". The
average response of the 40 customers to this question is a __________.
Question 3Select one:
A.
parameter
B.
population
C.
sample
D.
statistic
Feedback
The correct answer is: statistic
Question 4
Correct
4.0 points out of 4.0
Flag question
Question text
10. The absolute value of the difference between the point estimate and the
population parameter it estimates is the
Question 4Select one:
A.
standard error
B.
sampling error
