Question 1 of 20 1.0/ 1.0 Points
What is the term for a characteristic or attribute that can assume differentvalues?
A. datum
B.exponent Correct
C.variable
B. D.sample
Answer Key: C
Question 2 of 20 1.0/ 1.0 Points
A pareto chart does NOT have which of the following properties?A.It
is used to represent categorical data
C. The frequencies are arranged from highest to lowest Correct
C.The frequencies are arranged from lowest to highestD.It is a bar
chart
Answer Key: C
Question 3 of 20 1.0/ 1.0 Points
Suppose that a histogram of a data set is approximately symmetric and "bell
shaped". Approximately what percent of the observations are withintwo
standard deviations of the mean?
A.50%
Correct B.95%
C.68%
D.99.7%
Answer Key: B
Question 4 of 20 1.0/ 1.0 Points
,Suppose that a histogram of a data set is approximately symmetric and "bell
shaped". Approximately, what percent of the observations are withinthree
standard deviations of the mean?
A. 8%
B.95%
Correct C.99.7%D.50%
Answer Key: C
Question 5 of 20 1.0/ 1.0 Points
The amount of time needed to run the Boston marathon is an example ofwhich type
of variable?
Correct A.continuous
B.none of the above
C.qualitative
D.discrete
Answer Key: A
Question 6 of 20 1.0/ 1.0 Points
Gender and State are examples of which type of data?
A.Discrete data
B. Continuous data
C.Ordinal data
Correct D.Categorical data
Answer Key: D
Question 7 of 20 1.0/ 1.0 Points
,The average score for a class of 30 students was 75. The 20 male students in
the class averaged 70. The 10 female students in the classaveraged:
A.70
B.75
C.60
Correct D.85
Answer Key: D
Question 8 of 20 1.0/ 1.0 Points
Data that arise from counts are called:
A.continuous data
B.nominal data
C.counted data Correct
D.discrete data
Answer Key: D
Question 9 of 20 1.0/ 1.0 Points
Researchers may gain insight into the characteristics of a population byexamining a
A.mathematical model describing the population
B.description of the population
C.replica
Correct D.sample of the population
Answer Key: D
Question 10 of 20 0.0/ 1.0 Points
, What type of graph is the figure below?
A.ogive
Incorrect B.relative frequency histogramC.pictograph
D.Pareto chart
Answer Key: D
Question 11 of 20 1.0/ 1.0 Points
Which of the following statements are false?
Correct A.A categorical variable is nominal if there is natural ordering of its
possible values.
B.A variable is numerical if meaningful arithmetic can be performed on it.C.Zip
codes are usually treated as categorical variables, although they appear to be
numerical.
D.All of the above
Answer Key: A
Question 12 of 20 1.0/ 1.0 Points
For a boxplot, the box itself represents what percent of the observations?Correct
A.middle 50%
B.lower 25%
C.100%
D.upper 75%
Answer Key: A
What is the term for a characteristic or attribute that can assume differentvalues?
A. datum
B.exponent Correct
C.variable
B. D.sample
Answer Key: C
Question 2 of 20 1.0/ 1.0 Points
A pareto chart does NOT have which of the following properties?A.It
is used to represent categorical data
C. The frequencies are arranged from highest to lowest Correct
C.The frequencies are arranged from lowest to highestD.It is a bar
chart
Answer Key: C
Question 3 of 20 1.0/ 1.0 Points
Suppose that a histogram of a data set is approximately symmetric and "bell
shaped". Approximately what percent of the observations are withintwo
standard deviations of the mean?
A.50%
Correct B.95%
C.68%
D.99.7%
Answer Key: B
Question 4 of 20 1.0/ 1.0 Points
,Suppose that a histogram of a data set is approximately symmetric and "bell
shaped". Approximately, what percent of the observations are withinthree
standard deviations of the mean?
A. 8%
B.95%
Correct C.99.7%D.50%
Answer Key: C
Question 5 of 20 1.0/ 1.0 Points
The amount of time needed to run the Boston marathon is an example ofwhich type
of variable?
Correct A.continuous
B.none of the above
C.qualitative
D.discrete
Answer Key: A
Question 6 of 20 1.0/ 1.0 Points
Gender and State are examples of which type of data?
A.Discrete data
B. Continuous data
C.Ordinal data
Correct D.Categorical data
Answer Key: D
Question 7 of 20 1.0/ 1.0 Points
,The average score for a class of 30 students was 75. The 20 male students in
the class averaged 70. The 10 female students in the classaveraged:
A.70
B.75
C.60
Correct D.85
Answer Key: D
Question 8 of 20 1.0/ 1.0 Points
Data that arise from counts are called:
A.continuous data
B.nominal data
C.counted data Correct
D.discrete data
Answer Key: D
Question 9 of 20 1.0/ 1.0 Points
Researchers may gain insight into the characteristics of a population byexamining a
A.mathematical model describing the population
B.description of the population
C.replica
Correct D.sample of the population
Answer Key: D
Question 10 of 20 0.0/ 1.0 Points
, What type of graph is the figure below?
A.ogive
Incorrect B.relative frequency histogramC.pictograph
D.Pareto chart
Answer Key: D
Question 11 of 20 1.0/ 1.0 Points
Which of the following statements are false?
Correct A.A categorical variable is nominal if there is natural ordering of its
possible values.
B.A variable is numerical if meaningful arithmetic can be performed on it.C.Zip
codes are usually treated as categorical variables, although they appear to be
numerical.
D.All of the above
Answer Key: A
Question 12 of 20 1.0/ 1.0 Points
For a boxplot, the box itself represents what percent of the observations?Correct
A.middle 50%
B.lower 25%
C.100%
D.upper 75%
Answer Key: A
