ELEMENTARY STATISTICS EXAM 3 STUDY
GUIDE FULL QUESTIONS WITH DETAILED
ANSWERS
●● 2. A particularly common question in the study of wildlife behavior
involves observing contests between "residents"
of a particular area and "intruders." In each contest, the residents either
win or lose the encounter (assuming there
are no ties). Observers might record several variables, some of which are
listed below. Which of these variables is
categorical?
A) The duration of the contest (in seconds)
B) The number of animals involved in the contest
C) Whether the residents win or lose
D) The total number of contests won by the residents
Answer: C
●● 3. Variables that take numeric values for which arithmetic operations
make sense are called _______.
A) quantitative B) categorical C) distributions D) cases
Answer: A
,●● We have a data set where the cases are college students. One of the
variables in the data set is "age of the student."
What type of variable is age of the student?
A) Quantitative
B) Categorical
C) Quantitative and categorical
D) None of the above
Answer: A
●● 5. Suppose you own a pizza delivery company and you are trying to
determine the best campus on which to sell
pizza. What would be the best measurement to make the comparison?
A) Average number of pizzas purchased
B) Count of pizzas purchased
C) Rate of pizzas purchased
D) None of the above
Answer: B
●● 6. Quantitative variables are best displayed using _______.
A) stemplots
B) pie charts
C) bar graphs
D) pie charts or bar graphs
,Answer: A
●● 7. Large data sets with quantitative variables are best displayed using
________.
A) stemplots
B) histograms
C) stemplots and histograms
D) none of the above
Answer: B
●● 8. Below is a data set with information on students in a basic
statistics class at a local university. What is a key
characteristic of the data set?
Student ID GPA Hometown Major
23455 3.1 Chicago Math
23672 3.2 DC Statistics
4572 4 Atlanta Applied Math
89675 2.1 Kansas City Undeclared
65546 3.2 New York City Biology
7789 2.8 Raleigh Biology
90956 2.2 Santa Monica Statistics
56378 3 Richmond History
36455 3.8 Dallas Physics
, 46456 11.1 Austin Anthropology
A) There are 10 students in the data set.
B) The data describe students in a class.
C) There are three variables in the data set.
D) All of the above
Answer: D
●● A distributor of electronics is doing a customer satisfaction survey
for a manufacturer of tablet computers. A
sample of 68 clients is asked to rate a particular tablet on appearance,
functionality, ease of use, and price on a
scale of 1 to 10, where 1 corresponds to the worst rating and 10 to the
best possible rating. A bar graph of the ease
of use ratings classified by gender is given below.
What percentage of the sampled female clients rated the tablet as not so
easy to use (a rating of 4 or lower)?
A) 28% B) 29% C) 38% D) 62%
Answer: C
●● 10. In a statistics class with 136 students, the professor records how
much money each student has in their
possession during the first class of the semester. The histogram shown
below represents the data he collected.
GUIDE FULL QUESTIONS WITH DETAILED
ANSWERS
●● 2. A particularly common question in the study of wildlife behavior
involves observing contests between "residents"
of a particular area and "intruders." In each contest, the residents either
win or lose the encounter (assuming there
are no ties). Observers might record several variables, some of which are
listed below. Which of these variables is
categorical?
A) The duration of the contest (in seconds)
B) The number of animals involved in the contest
C) Whether the residents win or lose
D) The total number of contests won by the residents
Answer: C
●● 3. Variables that take numeric values for which arithmetic operations
make sense are called _______.
A) quantitative B) categorical C) distributions D) cases
Answer: A
,●● We have a data set where the cases are college students. One of the
variables in the data set is "age of the student."
What type of variable is age of the student?
A) Quantitative
B) Categorical
C) Quantitative and categorical
D) None of the above
Answer: A
●● 5. Suppose you own a pizza delivery company and you are trying to
determine the best campus on which to sell
pizza. What would be the best measurement to make the comparison?
A) Average number of pizzas purchased
B) Count of pizzas purchased
C) Rate of pizzas purchased
D) None of the above
Answer: B
●● 6. Quantitative variables are best displayed using _______.
A) stemplots
B) pie charts
C) bar graphs
D) pie charts or bar graphs
,Answer: A
●● 7. Large data sets with quantitative variables are best displayed using
________.
A) stemplots
B) histograms
C) stemplots and histograms
D) none of the above
Answer: B
●● 8. Below is a data set with information on students in a basic
statistics class at a local university. What is a key
characteristic of the data set?
Student ID GPA Hometown Major
23455 3.1 Chicago Math
23672 3.2 DC Statistics
4572 4 Atlanta Applied Math
89675 2.1 Kansas City Undeclared
65546 3.2 New York City Biology
7789 2.8 Raleigh Biology
90956 2.2 Santa Monica Statistics
56378 3 Richmond History
36455 3.8 Dallas Physics
, 46456 11.1 Austin Anthropology
A) There are 10 students in the data set.
B) The data describe students in a class.
C) There are three variables in the data set.
D) All of the above
Answer: D
●● A distributor of electronics is doing a customer satisfaction survey
for a manufacturer of tablet computers. A
sample of 68 clients is asked to rate a particular tablet on appearance,
functionality, ease of use, and price on a
scale of 1 to 10, where 1 corresponds to the worst rating and 10 to the
best possible rating. A bar graph of the ease
of use ratings classified by gender is given below.
What percentage of the sampled female clients rated the tablet as not so
easy to use (a rating of 4 or lower)?
A) 28% B) 29% C) 38% D) 62%
Answer: C
●● 10. In a statistics class with 136 students, the professor records how
much money each student has in their
possession during the first class of the semester. The histogram shown
below represents the data he collected.
