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QM 520 - Final Questions and Correct
Answers/ Latest Update / Already Graded
A continuous random variable may assume
Select one:
a. any value in an interval or collection of intervals
b. only integer values in an interval or collection of intervals
c. only fractional values in an interval or collection of intervals
d. only the positive integer values in an interval
Ans: any value in an interval or collection of intervals
A student makes an 82 on the first test in a statistics course. From this,
she assumes that her average at the end of the semester (after other
tests) will be about 82. This is an example of __________.
Select one:
A. descriptive statistics
B. inferential statistics
C. nonparametric statistics
D. wishful thinking
Ans: inferential statistics
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The standard deviation of a standard normal distribution
Select one:
A. is always equal to zero
B. is always equal to one
C. can be any positive value
D. can be any value
Ans: is always equal to one
Assume that you have a binomial experiment with p = 0.5 and a sample
size of 100. The expected value of this distribution is
Select one:
a. 0.50
b. 0.30
c. 100
d. 50
Ans: 50
David Desreumaux, VP of Human Resources of American First Banks
(AFB), is reviewing the employee training programs of AFB banks. His
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staff compiled the following table of regional statistics on teller
training hours. What can David conclude from these statistics?
Mean: SE Region - 20 SW Region - 28
median: SE Region - 20 SW Region 20
Mode: SE Region - 20 SW Region 21
Std Dev: SE Region - 5 SW Region 7
Select one:
a. The Southwest distribution has the least dispersion
b. The Southeast distribution is skewed to the left
c. The Southwest distribution is skewed to the right
d. The Southeast distribution has the greatest dispersion
Ans: The Southwest distribution is skewed to the right
Forty percent of all registered voters in a national election are female.
A random sample of 5 voters is selected. The probability that there are
no females in the sample is
Select one:
a. 0.0778
b. 0.7780
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c. 0.5000
d. 0.3456
Ans: 0.0778
X bar is an estimate of
Select one:
A. Mu
B. n
C. the sample mean
D. the median
Ans: Mu
A production process produces 2% defective parts. A sample of five
parts from the production process is selected. What is the probability
that the sample contains more than two defective parts?
Select one:
a. 0.0038
b. 0.0922
c. 0.9039
d. 0.0001
All rights reserved © 2025/ 2026 |
QM 520 - Final Questions and Correct
Answers/ Latest Update / Already Graded
A continuous random variable may assume
Select one:
a. any value in an interval or collection of intervals
b. only integer values in an interval or collection of intervals
c. only fractional values in an interval or collection of intervals
d. only the positive integer values in an interval
Ans: any value in an interval or collection of intervals
A student makes an 82 on the first test in a statistics course. From this,
she assumes that her average at the end of the semester (after other
tests) will be about 82. This is an example of __________.
Select one:
A. descriptive statistics
B. inferential statistics
C. nonparametric statistics
D. wishful thinking
Ans: inferential statistics
All rights reserved © 2025/ 2026 |
, Page |2
The standard deviation of a standard normal distribution
Select one:
A. is always equal to zero
B. is always equal to one
C. can be any positive value
D. can be any value
Ans: is always equal to one
Assume that you have a binomial experiment with p = 0.5 and a sample
size of 100. The expected value of this distribution is
Select one:
a. 0.50
b. 0.30
c. 100
d. 50
Ans: 50
David Desreumaux, VP of Human Resources of American First Banks
(AFB), is reviewing the employee training programs of AFB banks. His
All rights reserved © 2025/ 2026 |
, Page |3
staff compiled the following table of regional statistics on teller
training hours. What can David conclude from these statistics?
Mean: SE Region - 20 SW Region - 28
median: SE Region - 20 SW Region 20
Mode: SE Region - 20 SW Region 21
Std Dev: SE Region - 5 SW Region 7
Select one:
a. The Southwest distribution has the least dispersion
b. The Southeast distribution is skewed to the left
c. The Southwest distribution is skewed to the right
d. The Southeast distribution has the greatest dispersion
Ans: The Southwest distribution is skewed to the right
Forty percent of all registered voters in a national election are female.
A random sample of 5 voters is selected. The probability that there are
no females in the sample is
Select one:
a. 0.0778
b. 0.7780
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c. 0.5000
d. 0.3456
Ans: 0.0778
X bar is an estimate of
Select one:
A. Mu
B. n
C. the sample mean
D. the median
Ans: Mu
A production process produces 2% defective parts. A sample of five
parts from the production process is selected. What is the probability
that the sample contains more than two defective parts?
Select one:
a. 0.0038
b. 0.0922
c. 0.9039
d. 0.0001
All rights reserved © 2025/ 2026 |
