STT 215 Final Exam Study Guide Questions/Answer
Graded A+ 2025/2026
One year a survey asked a group of people from a certain country the following
question, "How many good friends do you have ?"Of the 849 people who responded, 9
% reported having only 1 good friend.
(b) What is the population for this survey?
A. The population is the public in the particular country.
B. The population is all of the people in the world.
C. The population is the 849 people who responded.
D. The population is the 9% who reported having only 1 good friend. - A. The population
is the public in the particular country.
One year a survey asked a group of people from a certain country the following
question, "How many good friends do you have ?"Of the 849 people who responded, 9
% reported having only 1 good friend.
(c) What is the statistic reported for this survey?
A. The statistic reported is the percentage of respondents who reported having only 1
good friend (9%).
B. The statistic reported is the number of people who responded 849.
C. The statistic reported is the number of good friends.
D. The statistic reported is the percentage of respondents who reported having more
than 1 good friend. - A. The statistic reported is the percentage of respondents who
reported having only 1 good friend (9%).
A poll of about 1250 people between the ages of 18 and 34
asked, "How concerned are you about the problem of
global warming?" The possible responses were very concerned, somewhat concerned,
not very concerned, and haven't heard about it. The poll reported percentages (46, 30,
22, 3) in these categories.
(a) Identify the sample and the population. Choose the correct answer below.
A. The sample is the set of 1250 people that were polled, while the population is the set
of all people between the ages of 18 and 34.
B. The sample is the set of people between the ages of 18 and 34, while the population
is the set of all people.
C. The sample is the set of 1250 people that were polled, while the population is the set
of all people.
D. The sample is the set of all people between the ages of 18 and 34 who are
concerned about global warming, while the population is the set of all people between
the ages of 18 and - A. The sample is the set of 1250 people that were polled, while the
population is the set of all people between the ages of 18 and 34.
, A poll of about 1250 people between the ages of 18 and 34
asked, "How concerned are you about the problem of
global warming?" The possible responses were very concerned, somewhat concerned,
not very concerned, and haven't heard about it. The poll reported percentages (46, 30,
22, 3) in these categories.
(b) Are the percentages quoted statistics or parameters? Why?
A. The percentages quoted are parameters because they are a numerical summary of
the entire population.
B. The percentages quoted are parameters because they can be used to make
decisions or predictions about a population.
C. The percentages quoted are statistics because they are a numerical summary of a
sample taken from a population.
D. The percentages quoted are statistics because they represent all of the possible
responses to the poll question. - C. The percentages quoted are statistics because they
are a numerical summary of a sample taken from a population.
A government agency uses a few new sports cars of each model every year to collect
data on pollution emission and gasoline mileage performance. For model A, identify
what is meant by (a) subject, (b) sample, and (c) population.
(a) What is the subject of the study conducted by the government agency?
A. The new model A sports cars
B. The model A sports cars
C. Sportscars
D. New sports cars - A. The new model A sports cars
A government agency uses a few new sports cars of each model every year to collect
data on pollution emission and gasoline mileage performance. For model A, identify
what is meant by (a) subject, (b) sample, and (c) population.
(b) What is the sample used by the government agency?
A. The few new model A sports cars that were chosen for the study.
B. All new model A sports cars.
C. Sportscars
D. Model A sports cars - A. The few new model A sports cars that were chosen for the
study.
A government agency uses a few new sports cars of each model every year to collect
data on pollution emission and gasoline mileage performance. For model A, identify
what is meant by (a) subject, (b) sample, and (c) population.
(c) What is the population for the government?
Graded A+ 2025/2026
One year a survey asked a group of people from a certain country the following
question, "How many good friends do you have ?"Of the 849 people who responded, 9
% reported having only 1 good friend.
(b) What is the population for this survey?
A. The population is the public in the particular country.
B. The population is all of the people in the world.
C. The population is the 849 people who responded.
D. The population is the 9% who reported having only 1 good friend. - A. The population
is the public in the particular country.
One year a survey asked a group of people from a certain country the following
question, "How many good friends do you have ?"Of the 849 people who responded, 9
% reported having only 1 good friend.
(c) What is the statistic reported for this survey?
A. The statistic reported is the percentage of respondents who reported having only 1
good friend (9%).
B. The statistic reported is the number of people who responded 849.
C. The statistic reported is the number of good friends.
D. The statistic reported is the percentage of respondents who reported having more
than 1 good friend. - A. The statistic reported is the percentage of respondents who
reported having only 1 good friend (9%).
A poll of about 1250 people between the ages of 18 and 34
asked, "How concerned are you about the problem of
global warming?" The possible responses were very concerned, somewhat concerned,
not very concerned, and haven't heard about it. The poll reported percentages (46, 30,
22, 3) in these categories.
(a) Identify the sample and the population. Choose the correct answer below.
A. The sample is the set of 1250 people that were polled, while the population is the set
of all people between the ages of 18 and 34.
B. The sample is the set of people between the ages of 18 and 34, while the population
is the set of all people.
C. The sample is the set of 1250 people that were polled, while the population is the set
of all people.
D. The sample is the set of all people between the ages of 18 and 34 who are
concerned about global warming, while the population is the set of all people between
the ages of 18 and - A. The sample is the set of 1250 people that were polled, while the
population is the set of all people between the ages of 18 and 34.
, A poll of about 1250 people between the ages of 18 and 34
asked, "How concerned are you about the problem of
global warming?" The possible responses were very concerned, somewhat concerned,
not very concerned, and haven't heard about it. The poll reported percentages (46, 30,
22, 3) in these categories.
(b) Are the percentages quoted statistics or parameters? Why?
A. The percentages quoted are parameters because they are a numerical summary of
the entire population.
B. The percentages quoted are parameters because they can be used to make
decisions or predictions about a population.
C. The percentages quoted are statistics because they are a numerical summary of a
sample taken from a population.
D. The percentages quoted are statistics because they represent all of the possible
responses to the poll question. - C. The percentages quoted are statistics because they
are a numerical summary of a sample taken from a population.
A government agency uses a few new sports cars of each model every year to collect
data on pollution emission and gasoline mileage performance. For model A, identify
what is meant by (a) subject, (b) sample, and (c) population.
(a) What is the subject of the study conducted by the government agency?
A. The new model A sports cars
B. The model A sports cars
C. Sportscars
D. New sports cars - A. The new model A sports cars
A government agency uses a few new sports cars of each model every year to collect
data on pollution emission and gasoline mileage performance. For model A, identify
what is meant by (a) subject, (b) sample, and (c) population.
(b) What is the sample used by the government agency?
A. The few new model A sports cars that were chosen for the study.
B. All new model A sports cars.
C. Sportscars
D. Model A sports cars - A. The few new model A sports cars that were chosen for the
study.
A government agency uses a few new sports cars of each model every year to collect
data on pollution emission and gasoline mileage performance. For model A, identify
what is meant by (a) subject, (b) sample, and (c) population.
(c) What is the population for the government?
