Elementary Statistics: Picturing
the World 9th Edition Test Bank
by Ron Larson Questions and
verified Answers Guaranteed
Pass (GRADED A+)
Question 1
A researcher records the number of hours students study each week.
Which level of measurement is represented by this variable?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Answer: D. Ratio
Rationale: Study hours have a true zero value, and ratios are
meaningful (e.g., 10 hours is twice as much as 5 hours). Therefore, the
ratio level of measurement applies.
Question 2
Which measure of central tendency is most affected by extreme values?
A. Mode
B. Median
,C. Mean
D. Midrange
Answer: C. Mean
Rationale: The mean incorporates every value in the dataset and is
therefore highly influenced by unusually large or small observations.
Question 3
What is the median of the data set: 4, 7, 9, 11, 15?
A. 7
B. 9
C. 11
D. 15
Answer: B. 9
Rationale: The median is the middle value when the data are arranged
in order. The middle value is 9.
Question 4
A survey asks participants to select their favorite type of music. What
type of data is being collected?
A. Quantitative
B. Continuous
C. Qualitative
D. Interval
Answer: C. Qualitative
,Rationale: Favorite music type is a category rather than a numerical
measurement, making it qualitative data.
Question 5
If the probability of an event is 0.25, what is the probability that the
event will not occur?
A. 0.75
B. 0.50
C. 0.25
D. 1.25
Answer: A. 0.75
Rationale: The probability of a complement equals 1 minus the
probability of the event. Therefore, 1 − 0.25 = 0.75.
Question 6
Which graph is most appropriate for displaying the distribution of a
quantitative variable?
A. Pie Chart
B. Histogram
C. Pictograph
D. Pareto Chart
Answer: B. Histogram
Rationale: Histograms are designed to show the frequency distribution
of numerical data across intervals.
, Question 7
A sample consists of 50 students selected from a university population
of 10,000 students. What is the population?
A. 50 students
B. The selected students
C. 10,000 students at the university
D. The researcher
Answer: C. 10,000 students at the university
Rationale: The population includes all individuals of interest, while the
sample is only a subset of that group.
Question 8
What is the range of the following data set: 12, 18, 24, 30, 36?
A. 18
B. 24
C. 30
D. 36
Answer: B. 24
Rationale: Range equals the maximum value minus the minimum value.
Therefore, 36 − 12 = 24.
Question 9
A fair coin is tossed once. What is the probability of obtaining heads?
the World 9th Edition Test Bank
by Ron Larson Questions and
verified Answers Guaranteed
Pass (GRADED A+)
Question 1
A researcher records the number of hours students study each week.
Which level of measurement is represented by this variable?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Answer: D. Ratio
Rationale: Study hours have a true zero value, and ratios are
meaningful (e.g., 10 hours is twice as much as 5 hours). Therefore, the
ratio level of measurement applies.
Question 2
Which measure of central tendency is most affected by extreme values?
A. Mode
B. Median
,C. Mean
D. Midrange
Answer: C. Mean
Rationale: The mean incorporates every value in the dataset and is
therefore highly influenced by unusually large or small observations.
Question 3
What is the median of the data set: 4, 7, 9, 11, 15?
A. 7
B. 9
C. 11
D. 15
Answer: B. 9
Rationale: The median is the middle value when the data are arranged
in order. The middle value is 9.
Question 4
A survey asks participants to select their favorite type of music. What
type of data is being collected?
A. Quantitative
B. Continuous
C. Qualitative
D. Interval
Answer: C. Qualitative
,Rationale: Favorite music type is a category rather than a numerical
measurement, making it qualitative data.
Question 5
If the probability of an event is 0.25, what is the probability that the
event will not occur?
A. 0.75
B. 0.50
C. 0.25
D. 1.25
Answer: A. 0.75
Rationale: The probability of a complement equals 1 minus the
probability of the event. Therefore, 1 − 0.25 = 0.75.
Question 6
Which graph is most appropriate for displaying the distribution of a
quantitative variable?
A. Pie Chart
B. Histogram
C. Pictograph
D. Pareto Chart
Answer: B. Histogram
Rationale: Histograms are designed to show the frequency distribution
of numerical data across intervals.
, Question 7
A sample consists of 50 students selected from a university population
of 10,000 students. What is the population?
A. 50 students
B. The selected students
C. 10,000 students at the university
D. The researcher
Answer: C. 10,000 students at the university
Rationale: The population includes all individuals of interest, while the
sample is only a subset of that group.
Question 8
What is the range of the following data set: 12, 18, 24, 30, 36?
A. 18
B. 24
C. 30
D. 36
Answer: B. 24
Rationale: Range equals the maximum value minus the minimum value.
Therefore, 36 − 12 = 24.
Question 9
A fair coin is tossed once. What is the probability of obtaining heads?
