Test
Bank
,Name: Class: Date:
Chapter 01 - Collecting Data
1. The entire collection of individuals or objects about which information is desired is called a sample.
a. True
b. False
ANSWER: False
2. A study is observational if the investigator observes the behavior of a response variable when one or more factors are
manipulated.
a. True
b. False
ANSWER: False
3. Suppose you are part of a gardening club with fifty members, all of whom are growing a particular variety of tomatoes
on a shared garden plot. Early in the growing season, you notice that tomatoes tended by some members were noticeably
redder than the tomatoes tended by other club members. You recall that, at the start of the growing season, a new
fertilizer became available and that some of the gardening club members started to use it on their tomatoes. Which of the
following studies could enable you to determine whether the new fertilizer contributed to the redder tomatoes?
a. Survey six of the fifty club members asking them if they used the new fertilizer and rate their tomato color.
b. Survey all fifty club members asking them if they used the new fertilizer and rate their tomato color.
c. Ask a group of six club members to plant more tomatoes with three members using only the new fertilizer and
three members using only the old fertilizer.
d. Survey the ten club members with the reddest tomatoes and ask them which fertilizer they used.
ANSWER: c
4. Which of the following statistical studies is observational?
a. A group of students is surveyed to determine the percentage who believe in reincarnation.
b. A random sample of students is shown a documentary on the evolution of reincarnation beliefs throughout
human history. A second random sample is not shown in the documentary. The object of the study is to
determine whether viewing the documentary affects belief in reincarnation.
c. To determine whether vitamin C has any effectiveness at lessening the duration of the common cold, one set
of cold sufferers is given no vitamin C, a second set is given 2 grams per day, and a third set is given 5 grams
of vitamin C per day.
d. To determine if a new regenerative injection therapy is effective for reducing knee arthritis pain, a randomly
selected group of arthritis patients were randomly assigned to two groups. In one group, the patients received
physical therapy plus the new regenerative injection therapy. In the other group, the patients received only
physical therapy.
ANSWER: a
5. Which of the following statistical studies is an experimental study?
I) A researcher observes the effect of alcohol consumption on reaction time by administering various quantities of
alcohol to randomly selected subjects.
II) A study is conducted to see if exposure to increased carbon dioxide levels increases tomato yield. Tomato
plants are selected at random and then exposed to various doses of carbon dioxide.
III) Two random samples of senior adults are selected. The first group watches a 30-minute presentation on
Medicare fraud, while the other group does not watch the presentation. A survey is then administered to measure
the level of confidence that subjects have in their healthcare providers.
a. I and II only
b. II and III only
,Name: Class: Date:
Chapter 01 - Collecting Data
c. I and III only
d. I, II, and III
ANSWER: d
6. Suppose you would like to know the flavor of ice cream preferred by the students at your university. Which of the
following studies would help you learn the preferred ice cream flavor of your university student population?
a. Survey a random sample of fifty students asking them their favorite ice cream flavor.
b. Conduct an experiment on fifty student volunteers where the volunteers are randomly assigned to different
groups, each of which is asked to try a single flavor of ice cream and report how well they like it.
c. Survey a sample of fifty students from the freshman class asking them their favorite ice cream flavor.
d. Conduct an experiment on fifty students randomly selected students from the senior class. In the experiment,
the participants are randomly assigned to different groups, each of which is asked to try a single flavor of ice
cream and report how well they like it.
ANSWER: a
7. You’re the owner of a bakery that produces cakes for special events. You’re considering investing in new equipment
that would enable you to create larger cakes with more elaborate decorations. Before investing in the new equipment, it is
essential that you know whether or not your clients would pay more money for the larger, more elaborate cakes. You have
100 clients, all of whom would respond to an inquiry within the time frame in which you must decide whether or not to
purchase the new equipment. Which of the following studies would give you the best insight into whether or not your
client population would purchase the larger, more elaborately decorated cakes?
a. A survey of the next ten clients who contact you to order cakes
b. A survey of ten clients selected at random from a list of all your clients
c. A survey of the ten clients who placed the largest number of cake orders over the past year
d. A census of your clients
ANSWER: d
8. You’re a veterinarian interested in the effect of brisk, daily walks on the health of large dogs. You take a survey of 100
dog owners and find that dogs taken for one or more brisk walks each day become ill less frequently. Which of the
following describes this finding?
a. A statistic because it reflects data taken from the entire population of large dogs
b. A population parameter because it reflects data taken from a sample
c. A statistic because it reflects data taken from a sample
d. A population characteristic because the study was based on a census.
ANSWER: c
9. You live in an apartment building with 50 residents. You’re investigating the effect of a new bus stop on the ability of
your building’s residents to arrive at work on time. You survey all 50 of the building’s residents and ask them questions
about their work arrival time since the new bus stop became available. Which of the following accurately describes the
results of your survey?
a. A population characteristic because it was based on a census
b. A statistic because the sample did not include residents from buildings in other neighborhoods
c. A statistic because the sample was drawn from an easily available group
d. A population parameter because it was based on a sample of residents from the building
ANSWER: a
, Name: Class: Date:
Chapter 01 - Collecting Data
10. You’re concerned about the concentration of nitrates in the drinking water wells in your city. There are 200 wells in
your city. You take water from 58 of these wells and analyze the water to determine nitrate concentration. The average
nitrate concentration from the 58 wells is 5 milligrams per liter. Which of the following accurately describes your 5
milligrams per liter average concentration?
a. A statistic because it is based on a sample of the city’s wells.
b. A population characteristic because it is based on a sample from the city’s wells.
c. A statistic because it was based on a census of the city’s wells.
d. A population characteristic because it is based on a census of the city’s wells.
ANSWER: a
11. Suppose you’re the owner of a sewing supplies shop. You have an inventory of 50 thread packages in your store,
some of which contain nylon fiber. You’re interested in learning how many of the thread packages in your inventory
contain nylon fiber. You perform a simple test for nylon fiber on all 50 packages of thread in your store and find that 10
of the 50 contain nylon fiber. Which of the following accurately describes the results of your survey?
a. A statistic because it is based on a sample of the shop’s thread packages
b. A population parameter because it is based on a census of the shop’s thread packages
c. A statistic because it was based on a census of the shop’s thread packages
d. A population parameter because it is based on a sample of the shop’s thread packages.
ANSWER: b
12. You’re interested in learning about the typical body weight of residents in the small town where you live. The town
has only 200 residents. You send out a questionnaire to all 200 residents asking them for their body weight in kilograms.
All 200 residents reply with the requested data. You use the data supplied by all 200 residents to determine the typical
body weight of your town’s residents. Which of the following accurately describes the typical body weight you just
determined?
a. A statistic because it was based on a sample of your town’s residents
b. A population characteristic because it was based on a sample of your town’s residents
c. A statistic because it was based on a census of your town’s residents
d. A population parameter because it was based on a census of your town’s residents
ANSWER: d
13. Which of the following are the advantages of a simple random sample in an observational study?
a. The sample can be drawn from an easily available group.
b. The sample statistics will be distinctly different from the population parameters.
c. All individuals in the population need not have the same chance of being included in the sample.
d. Your sample statistics will reflect the population characteristics.
ANSWER: d
14. A simple random sample of size n is a sample selected from a population in such a way that every different possible
sample of this same size n has an equal chance of being selected.
a. True
b. False
ANSWER: True
15. As long as the sample size is small relative to the population, there is little practical difference between sampling with
replacement and sampling without replacement.
Bank
,Name: Class: Date:
Chapter 01 - Collecting Data
1. The entire collection of individuals or objects about which information is desired is called a sample.
a. True
b. False
ANSWER: False
2. A study is observational if the investigator observes the behavior of a response variable when one or more factors are
manipulated.
a. True
b. False
ANSWER: False
3. Suppose you are part of a gardening club with fifty members, all of whom are growing a particular variety of tomatoes
on a shared garden plot. Early in the growing season, you notice that tomatoes tended by some members were noticeably
redder than the tomatoes tended by other club members. You recall that, at the start of the growing season, a new
fertilizer became available and that some of the gardening club members started to use it on their tomatoes. Which of the
following studies could enable you to determine whether the new fertilizer contributed to the redder tomatoes?
a. Survey six of the fifty club members asking them if they used the new fertilizer and rate their tomato color.
b. Survey all fifty club members asking them if they used the new fertilizer and rate their tomato color.
c. Ask a group of six club members to plant more tomatoes with three members using only the new fertilizer and
three members using only the old fertilizer.
d. Survey the ten club members with the reddest tomatoes and ask them which fertilizer they used.
ANSWER: c
4. Which of the following statistical studies is observational?
a. A group of students is surveyed to determine the percentage who believe in reincarnation.
b. A random sample of students is shown a documentary on the evolution of reincarnation beliefs throughout
human history. A second random sample is not shown in the documentary. The object of the study is to
determine whether viewing the documentary affects belief in reincarnation.
c. To determine whether vitamin C has any effectiveness at lessening the duration of the common cold, one set
of cold sufferers is given no vitamin C, a second set is given 2 grams per day, and a third set is given 5 grams
of vitamin C per day.
d. To determine if a new regenerative injection therapy is effective for reducing knee arthritis pain, a randomly
selected group of arthritis patients were randomly assigned to two groups. In one group, the patients received
physical therapy plus the new regenerative injection therapy. In the other group, the patients received only
physical therapy.
ANSWER: a
5. Which of the following statistical studies is an experimental study?
I) A researcher observes the effect of alcohol consumption on reaction time by administering various quantities of
alcohol to randomly selected subjects.
II) A study is conducted to see if exposure to increased carbon dioxide levels increases tomato yield. Tomato
plants are selected at random and then exposed to various doses of carbon dioxide.
III) Two random samples of senior adults are selected. The first group watches a 30-minute presentation on
Medicare fraud, while the other group does not watch the presentation. A survey is then administered to measure
the level of confidence that subjects have in their healthcare providers.
a. I and II only
b. II and III only
,Name: Class: Date:
Chapter 01 - Collecting Data
c. I and III only
d. I, II, and III
ANSWER: d
6. Suppose you would like to know the flavor of ice cream preferred by the students at your university. Which of the
following studies would help you learn the preferred ice cream flavor of your university student population?
a. Survey a random sample of fifty students asking them their favorite ice cream flavor.
b. Conduct an experiment on fifty student volunteers where the volunteers are randomly assigned to different
groups, each of which is asked to try a single flavor of ice cream and report how well they like it.
c. Survey a sample of fifty students from the freshman class asking them their favorite ice cream flavor.
d. Conduct an experiment on fifty students randomly selected students from the senior class. In the experiment,
the participants are randomly assigned to different groups, each of which is asked to try a single flavor of ice
cream and report how well they like it.
ANSWER: a
7. You’re the owner of a bakery that produces cakes for special events. You’re considering investing in new equipment
that would enable you to create larger cakes with more elaborate decorations. Before investing in the new equipment, it is
essential that you know whether or not your clients would pay more money for the larger, more elaborate cakes. You have
100 clients, all of whom would respond to an inquiry within the time frame in which you must decide whether or not to
purchase the new equipment. Which of the following studies would give you the best insight into whether or not your
client population would purchase the larger, more elaborately decorated cakes?
a. A survey of the next ten clients who contact you to order cakes
b. A survey of ten clients selected at random from a list of all your clients
c. A survey of the ten clients who placed the largest number of cake orders over the past year
d. A census of your clients
ANSWER: d
8. You’re a veterinarian interested in the effect of brisk, daily walks on the health of large dogs. You take a survey of 100
dog owners and find that dogs taken for one or more brisk walks each day become ill less frequently. Which of the
following describes this finding?
a. A statistic because it reflects data taken from the entire population of large dogs
b. A population parameter because it reflects data taken from a sample
c. A statistic because it reflects data taken from a sample
d. A population characteristic because the study was based on a census.
ANSWER: c
9. You live in an apartment building with 50 residents. You’re investigating the effect of a new bus stop on the ability of
your building’s residents to arrive at work on time. You survey all 50 of the building’s residents and ask them questions
about their work arrival time since the new bus stop became available. Which of the following accurately describes the
results of your survey?
a. A population characteristic because it was based on a census
b. A statistic because the sample did not include residents from buildings in other neighborhoods
c. A statistic because the sample was drawn from an easily available group
d. A population parameter because it was based on a sample of residents from the building
ANSWER: a
, Name: Class: Date:
Chapter 01 - Collecting Data
10. You’re concerned about the concentration of nitrates in the drinking water wells in your city. There are 200 wells in
your city. You take water from 58 of these wells and analyze the water to determine nitrate concentration. The average
nitrate concentration from the 58 wells is 5 milligrams per liter. Which of the following accurately describes your 5
milligrams per liter average concentration?
a. A statistic because it is based on a sample of the city’s wells.
b. A population characteristic because it is based on a sample from the city’s wells.
c. A statistic because it was based on a census of the city’s wells.
d. A population characteristic because it is based on a census of the city’s wells.
ANSWER: a
11. Suppose you’re the owner of a sewing supplies shop. You have an inventory of 50 thread packages in your store,
some of which contain nylon fiber. You’re interested in learning how many of the thread packages in your inventory
contain nylon fiber. You perform a simple test for nylon fiber on all 50 packages of thread in your store and find that 10
of the 50 contain nylon fiber. Which of the following accurately describes the results of your survey?
a. A statistic because it is based on a sample of the shop’s thread packages
b. A population parameter because it is based on a census of the shop’s thread packages
c. A statistic because it was based on a census of the shop’s thread packages
d. A population parameter because it is based on a sample of the shop’s thread packages.
ANSWER: b
12. You’re interested in learning about the typical body weight of residents in the small town where you live. The town
has only 200 residents. You send out a questionnaire to all 200 residents asking them for their body weight in kilograms.
All 200 residents reply with the requested data. You use the data supplied by all 200 residents to determine the typical
body weight of your town’s residents. Which of the following accurately describes the typical body weight you just
determined?
a. A statistic because it was based on a sample of your town’s residents
b. A population characteristic because it was based on a sample of your town’s residents
c. A statistic because it was based on a census of your town’s residents
d. A population parameter because it was based on a census of your town’s residents
ANSWER: d
13. Which of the following are the advantages of a simple random sample in an observational study?
a. The sample can be drawn from an easily available group.
b. The sample statistics will be distinctly different from the population parameters.
c. All individuals in the population need not have the same chance of being included in the sample.
d. Your sample statistics will reflect the population characteristics.
ANSWER: d
14. A simple random sample of size n is a sample selected from a population in such a way that every different possible
sample of this same size n has an equal chance of being selected.
a. True
b. False
ANSWER: True
15. As long as the sample size is small relative to the population, there is little practical difference between sampling with
replacement and sampling without replacement.
