Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Stat 100 – Final Exam Study Guide
Solutions
Is the following variable quantitative (measurement) or categorical: Level of Education Completed -
ANSWER✔✔-Categorical
Is the following variable quantitative (measurement) or categorical: Eye Color - ANSWER✔✔-Categorical
Is the following variable quantitative (measurement) or categorical: Course Letter Grades - ANSWER✔✔-
Categorical
Is the following variable quantitative (measurement) or categorical: Number of Students in a Class -
ANSWER✔✔-Quantitative
Is the following variable quantitative (measurement) or categorical: Weight - ANSWER✔✔-Quantitative
Is the following variable continuous, discrete, ordinal or nominal: Level of Education Completed -
ANSWER✔✔-Ordinal
Is the following variable continuous, discrete, ordinal or nominal: Eye Color - ANSWER✔✔-Nominal
Is the following variable continuous, discrete, ordinal or nominal: Weight - ANSWER✔✔-Continuous
Is the following variable continuous, discrete, ordinal or nominal: Number of Students in a Class -
ANSWER✔✔-Discrete
Is the following variable continuous, discrete, ordinal or nominal: Course Letter Grades - ANSWER✔✔-
Ordinal
Copyright ©Stuvia International BV 2010-2024 Page 1/37
,Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Which of the following would be considered RELIABLE? - ANSWER✔✔-A clock that is always five minutes
fast
Which of the following would be considered VALID? - ANSWER✔✔-A clock that is always five minutes
fast
You take a survey for our class where I tell you that although I know who submitted surveys I will keep all
responses secret. This is an example of a: - ANSWER✔✔-Confidential Survey
Which of the following would be considered BIASED? - ANSWER✔✔-A clock that is always five minutes
fast
Which of the following questions is a BETTER example of deliberate bias? - ANSWER✔✔-If you saw a
fellow student cheating on an exam would you be a squealer and turn them in?
Type of movie (comedy, action, etc.) - ANSWER✔✔-Categorical, Nominal
Speed driven in your car - ANSWER✔✔-Quantitative, Continuous
Time in 100-meter free swim - ANSWER✔✔-Quantitative, Continuous
Number of aces in a tennis match - ANSWER✔✔-Quantitative, Discrete
Attendance at Beaver Stadium on opening day - ANSWER✔✔-Quantitative, Discrete
Type of Art - ANSWER✔✔-Categorical, Nominal
Instrument learned in school - ANSWER✔✔-Categorical, Nominal
A clock that is five minutes fast would be considered (check all that apply): - ANSWER✔✔-Reliable, valid,
biased
Copyright ©Stuvia International BV 2010-2024 Page 2/37
,Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
A scale that sometimes several pounds too low and other times too high (check all that apply): -
ANSWER✔✔-Valid
You were mistakenly assigned exam 1 from a graduate-level class instead of STAT 100 (check all that
apply): - ANSWER✔✔-Reliable
If your significant other asked you how they looked wearing an outfit most people would respond
positively. This is an example of: - ANSWER✔✔-Desire to please
If you found a wallet with $100 in it on the street, would you do the honest thing and turn the wallet and
money in. This is an example of: - ANSWER✔✔-Deliberate Bias
Decide if the sample is representative (or not) of the population for the question of interest.
Question: Average daily hours of sleep over a one year period.
Sample: Hours of sleep for 100 randomly selected students the night before an exam.
Population: All students in the university. - ANSWER✔✔-Not Representative: taking a sample of students
the night before an exam would most likely not be representative of a usual night's sleep over the course
of a year
A survey-taker randomly selected 1000 students who were studying in the library and found that 90% of
these students were in favor of longer library hours. The results of this study, if applied to all students in
the university, are questionable because of - ANSWER✔✔-selection bias
A randomly selected sample of 25 college students was asked whether they had ever used the drug
Ecstasy. Which of the following would be the margin of error? - ANSWER✔✔-1 divided by the square
root of 25 or 0.2
Copyright ©Stuvia International BV 2010-2024 Page 3/37
, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
For a survey of American diets a random sample of 1000 people were contacted. Of the 1000 people,
340 people completed the questionnaire. The results of this study, if applied to all Americans, are
questionable because of - ANSWER✔✔-nonresponse bias
A census differs from a sample survey because - ANSWER✔✔-in a census the whole population is
measured.
When a representative sample is selected but respondents give answers that are different from their
true opinions, the problem is called - ANSWER✔✔-response bias
A television news program asks viewers to log onto their website and vote on a different issue each day.
The website allows visitors to select one of two choices and submit a vote. The results of the poll are
reported the next day on the news program. The population to which the results of these polls can be
extended is - ANSWER✔✔-only viewers who voted in that specific poll
A tea manufacturer is trying to decide whether to add peach flavoring or mango flavoring to green tea
for a new product. A study is done by stopping customers at a grocery store and asking them to drink a
small cup of tea with each flavoring, then to rate each of the two flavors on a scale from 1 to 10. The
order in which the teas are presented is randomly assigned for each person. This study is an example of -
ANSWER✔✔-a matched-pairs design
A medicine to remove the redness in eyes was tested in a group of 100 students. Each student took the
medicine in one eye and a placebo in the other eye. The eye (left or right) that received the placebo was
decided by flipping a coin. - ANSWER✔✔-Experiment
Sickle-cell disease is a painful disorder of the red blood cells. To investigate whether drug A can reduce
the pain associated with sickle-cell disease, a study by the National Institutes of Health randomly
assigned 150 sickle-cell sufferers to receive the drug. Placebos were given to another 150 sickle-cell
Copyright ©Stuvia International BV 2010-2024 Page 4/37
Stat 100 – Final Exam Study Guide
Solutions
Is the following variable quantitative (measurement) or categorical: Level of Education Completed -
ANSWER✔✔-Categorical
Is the following variable quantitative (measurement) or categorical: Eye Color - ANSWER✔✔-Categorical
Is the following variable quantitative (measurement) or categorical: Course Letter Grades - ANSWER✔✔-
Categorical
Is the following variable quantitative (measurement) or categorical: Number of Students in a Class -
ANSWER✔✔-Quantitative
Is the following variable quantitative (measurement) or categorical: Weight - ANSWER✔✔-Quantitative
Is the following variable continuous, discrete, ordinal or nominal: Level of Education Completed -
ANSWER✔✔-Ordinal
Is the following variable continuous, discrete, ordinal or nominal: Eye Color - ANSWER✔✔-Nominal
Is the following variable continuous, discrete, ordinal or nominal: Weight - ANSWER✔✔-Continuous
Is the following variable continuous, discrete, ordinal or nominal: Number of Students in a Class -
ANSWER✔✔-Discrete
Is the following variable continuous, discrete, ordinal or nominal: Course Letter Grades - ANSWER✔✔-
Ordinal
Copyright ©Stuvia International BV 2010-2024 Page 1/37
,Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Which of the following would be considered RELIABLE? - ANSWER✔✔-A clock that is always five minutes
fast
Which of the following would be considered VALID? - ANSWER✔✔-A clock that is always five minutes
fast
You take a survey for our class where I tell you that although I know who submitted surveys I will keep all
responses secret. This is an example of a: - ANSWER✔✔-Confidential Survey
Which of the following would be considered BIASED? - ANSWER✔✔-A clock that is always five minutes
fast
Which of the following questions is a BETTER example of deliberate bias? - ANSWER✔✔-If you saw a
fellow student cheating on an exam would you be a squealer and turn them in?
Type of movie (comedy, action, etc.) - ANSWER✔✔-Categorical, Nominal
Speed driven in your car - ANSWER✔✔-Quantitative, Continuous
Time in 100-meter free swim - ANSWER✔✔-Quantitative, Continuous
Number of aces in a tennis match - ANSWER✔✔-Quantitative, Discrete
Attendance at Beaver Stadium on opening day - ANSWER✔✔-Quantitative, Discrete
Type of Art - ANSWER✔✔-Categorical, Nominal
Instrument learned in school - ANSWER✔✔-Categorical, Nominal
A clock that is five minutes fast would be considered (check all that apply): - ANSWER✔✔-Reliable, valid,
biased
Copyright ©Stuvia International BV 2010-2024 Page 2/37
,Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
A scale that sometimes several pounds too low and other times too high (check all that apply): -
ANSWER✔✔-Valid
You were mistakenly assigned exam 1 from a graduate-level class instead of STAT 100 (check all that
apply): - ANSWER✔✔-Reliable
If your significant other asked you how they looked wearing an outfit most people would respond
positively. This is an example of: - ANSWER✔✔-Desire to please
If you found a wallet with $100 in it on the street, would you do the honest thing and turn the wallet and
money in. This is an example of: - ANSWER✔✔-Deliberate Bias
Decide if the sample is representative (or not) of the population for the question of interest.
Question: Average daily hours of sleep over a one year period.
Sample: Hours of sleep for 100 randomly selected students the night before an exam.
Population: All students in the university. - ANSWER✔✔-Not Representative: taking a sample of students
the night before an exam would most likely not be representative of a usual night's sleep over the course
of a year
A survey-taker randomly selected 1000 students who were studying in the library and found that 90% of
these students were in favor of longer library hours. The results of this study, if applied to all students in
the university, are questionable because of - ANSWER✔✔-selection bias
A randomly selected sample of 25 college students was asked whether they had ever used the drug
Ecstasy. Which of the following would be the margin of error? - ANSWER✔✔-1 divided by the square
root of 25 or 0.2
Copyright ©Stuvia International BV 2010-2024 Page 3/37
, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
For a survey of American diets a random sample of 1000 people were contacted. Of the 1000 people,
340 people completed the questionnaire. The results of this study, if applied to all Americans, are
questionable because of - ANSWER✔✔-nonresponse bias
A census differs from a sample survey because - ANSWER✔✔-in a census the whole population is
measured.
When a representative sample is selected but respondents give answers that are different from their
true opinions, the problem is called - ANSWER✔✔-response bias
A television news program asks viewers to log onto their website and vote on a different issue each day.
The website allows visitors to select one of two choices and submit a vote. The results of the poll are
reported the next day on the news program. The population to which the results of these polls can be
extended is - ANSWER✔✔-only viewers who voted in that specific poll
A tea manufacturer is trying to decide whether to add peach flavoring or mango flavoring to green tea
for a new product. A study is done by stopping customers at a grocery store and asking them to drink a
small cup of tea with each flavoring, then to rate each of the two flavors on a scale from 1 to 10. The
order in which the teas are presented is randomly assigned for each person. This study is an example of -
ANSWER✔✔-a matched-pairs design
A medicine to remove the redness in eyes was tested in a group of 100 students. Each student took the
medicine in one eye and a placebo in the other eye. The eye (left or right) that received the placebo was
decided by flipping a coin. - ANSWER✔✔-Experiment
Sickle-cell disease is a painful disorder of the red blood cells. To investigate whether drug A can reduce
the pain associated with sickle-cell disease, a study by the National Institutes of Health randomly
assigned 150 sickle-cell sufferers to receive the drug. Placebos were given to another 150 sickle-cell
Copyright ©Stuvia International BV 2010-2024 Page 4/37
