QM 520 - Final Exam Questions with Correct Answers Latest Update 2025/2026
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 - Answers 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 - Answers inferential statistics
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 - Answers 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 - Answers 50
David Desreumaux, VP of Human Resources of American First Banks (AFB), is reviewing the
employee training programs of AFB banks. His 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 - Answers 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
c. 0.5000
d. 0.3456 - Answers 0.0778
X bar is an estimate of
Select one:
A. Mu
, B. n
C. the sample mean
D. the median - Answers 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 - Answers 0.0001
A commuter travels many miles to work each morning. She has timed this trip 5 times during
the last month. The time (in minutes) required to make this trip was 44, 39, 41, 35, and 41. What
is the standard deviation for this sample data?
Select one:
a. 3.32
b. 2.97
c. 1.73
d. 11 - Answers 3.32
A numerical value used as a summary measure for a sample, such as sample mean, is known
as
Select one:
a. Population Parameter
b. Sample parameter
c. Population mean
d. Sample statistics - Answers Sample statistics
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 exactly two defective parts?
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 - Answers 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 - Answers inferential statistics
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 - Answers 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 - Answers 50
David Desreumaux, VP of Human Resources of American First Banks (AFB), is reviewing the
employee training programs of AFB banks. His 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 - Answers 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
c. 0.5000
d. 0.3456 - Answers 0.0778
X bar is an estimate of
Select one:
A. Mu
, B. n
C. the sample mean
D. the median - Answers 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 - Answers 0.0001
A commuter travels many miles to work each morning. She has timed this trip 5 times during
the last month. The time (in minutes) required to make this trip was 44, 39, 41, 35, and 41. What
is the standard deviation for this sample data?
Select one:
a. 3.32
b. 2.97
c. 1.73
d. 11 - Answers 3.32
A numerical value used as a summary measure for a sample, such as sample mean, is known
as
Select one:
a. Population Parameter
b. Sample parameter
c. Population mean
d. Sample statistics - Answers Sample statistics
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 exactly two defective parts?
