STAT310 Questions and Comprehensive
Answers Graded A+ 2024-2025
If you want to study the effect of hormonal changes in adolescent boys, your population
would be - ✔️✔️all adolescent males
If you want to study the effect of hormonal changes as boys reach adolescence, your
sample would most likely include - ✔️✔️pre-adolescent and post-adolescent boys
Which of the following is most likely to be measured categorically? - ✔️✔️species of dogs
appearing in the Sunday comics
Another name for measurement data is _______ data. - ✔️✔️quantitative and numerical
To produce good estimates of population parameters we need to have a _______
sample. - ✔️✔️representative or random
Suppose that you poured out a bag of M&Ms and found 48 blues, 35 greens, 30 reds,
and 15 browns. Which of the following seems like the most reasonable conclusion to
draw? - ✔️✔️It is impossible to tell what the manufacturer is doing in terms of proportions
of colors
Inferential statistics are primarily concerned with - ✔️✔️making inferences about a
population from a sample
When given a cup of coffee before a race, a sample of runners were found to run the
race faster than without coffee. If we then conclude that on average, runners run faster
after drinking coffee, this would be an example of - ✔️✔️a statistical inference
Which of the following is true? - ✔️✔️a sample refers to the observations drawn from a
population
For a researcher to be able to accurately estimate the parameters of a population of
interest from his or her sample, the sample must be - ✔️✔️representative and random
A researcher obtained attractiveness ratings on a scale from 1 to 100. She then
classified people into "attractive" and "unattractive" groups on the basis of these scores.
In this example, the researcher used _______ data to create _______ data. -
✔️✔️measurement; categorical
An example of a statistical inference is - ✔️✔️generalizing data from a sample of girls to a
population of girls
, Without a representative, random sample, we cannot - ✔️✔️accurately estimate the
parameters of a population
The amount of time it takes you to open a child-proof container is an example of -
✔️✔️measurement data
A psychologist was interested in predicting the number of times a young adult had been
arrested from that person's attendance in high school. The number of arrests is - ✔️✔️the
dependent variable
Why are we interested in categorizing data as nominal, ordinal, interval or ratio? - ✔️✔️it
will influence the type of analysis we can perform
If we are comparing the adrenaline scores of children who live near an airport with those
who live away from an airport, the independent variable is - ✔️✔️distance from the airport
In the preceding question the dependent variable is - ✔️✔️adrenaline
Which of the following is a discrete variable? - ✔️✔️depression score on a Likert scale
The Greek letter S (∑ ) is a symbol for - ✔️✔️summation
Which of the following is most certainly an ordinal scale? - ✔️✔️Ratings scores of movies
on Rotten Tomatoes
Professor Jeffrey assigned each of his students a number, then, randomly selected 20
students for his study by using a table of random numbers. Professor Jeffrey was
interested in whether the type of feedback received would affect the level of happiness
in his students. The students were either praised or insulted, then the levels of
happiness were measured by a questionnaire administered at the end of the study.
What is the type of this study? - ✔️✔️experimental study
In the above study, what is the independent variable? - ✔️✔️feedback
In an experiment, an independent variable is _______ and a dependent variable is
_______. - ✔️✔️manipulated, measured
Ordinal scales... - ✔️✔️provide information by ordering people, objects, or events along
some continuum that has meaning (Think: good, better, best)
When _______ is used, every subject in a study has an equal chance of being placed in
each of the groups being formed? - ✔️✔️random assignment
Answers Graded A+ 2024-2025
If you want to study the effect of hormonal changes in adolescent boys, your population
would be - ✔️✔️all adolescent males
If you want to study the effect of hormonal changes as boys reach adolescence, your
sample would most likely include - ✔️✔️pre-adolescent and post-adolescent boys
Which of the following is most likely to be measured categorically? - ✔️✔️species of dogs
appearing in the Sunday comics
Another name for measurement data is _______ data. - ✔️✔️quantitative and numerical
To produce good estimates of population parameters we need to have a _______
sample. - ✔️✔️representative or random
Suppose that you poured out a bag of M&Ms and found 48 blues, 35 greens, 30 reds,
and 15 browns. Which of the following seems like the most reasonable conclusion to
draw? - ✔️✔️It is impossible to tell what the manufacturer is doing in terms of proportions
of colors
Inferential statistics are primarily concerned with - ✔️✔️making inferences about a
population from a sample
When given a cup of coffee before a race, a sample of runners were found to run the
race faster than without coffee. If we then conclude that on average, runners run faster
after drinking coffee, this would be an example of - ✔️✔️a statistical inference
Which of the following is true? - ✔️✔️a sample refers to the observations drawn from a
population
For a researcher to be able to accurately estimate the parameters of a population of
interest from his or her sample, the sample must be - ✔️✔️representative and random
A researcher obtained attractiveness ratings on a scale from 1 to 100. She then
classified people into "attractive" and "unattractive" groups on the basis of these scores.
In this example, the researcher used _______ data to create _______ data. -
✔️✔️measurement; categorical
An example of a statistical inference is - ✔️✔️generalizing data from a sample of girls to a
population of girls
, Without a representative, random sample, we cannot - ✔️✔️accurately estimate the
parameters of a population
The amount of time it takes you to open a child-proof container is an example of -
✔️✔️measurement data
A psychologist was interested in predicting the number of times a young adult had been
arrested from that person's attendance in high school. The number of arrests is - ✔️✔️the
dependent variable
Why are we interested in categorizing data as nominal, ordinal, interval or ratio? - ✔️✔️it
will influence the type of analysis we can perform
If we are comparing the adrenaline scores of children who live near an airport with those
who live away from an airport, the independent variable is - ✔️✔️distance from the airport
In the preceding question the dependent variable is - ✔️✔️adrenaline
Which of the following is a discrete variable? - ✔️✔️depression score on a Likert scale
The Greek letter S (∑ ) is a symbol for - ✔️✔️summation
Which of the following is most certainly an ordinal scale? - ✔️✔️Ratings scores of movies
on Rotten Tomatoes
Professor Jeffrey assigned each of his students a number, then, randomly selected 20
students for his study by using a table of random numbers. Professor Jeffrey was
interested in whether the type of feedback received would affect the level of happiness
in his students. The students were either praised or insulted, then the levels of
happiness were measured by a questionnaire administered at the end of the study.
What is the type of this study? - ✔️✔️experimental study
In the above study, what is the independent variable? - ✔️✔️feedback
In an experiment, an independent variable is _______ and a dependent variable is
_______. - ✔️✔️manipulated, measured
Ordinal scales... - ✔️✔️provide information by ordering people, objects, or events along
some continuum that has meaning (Think: good, better, best)
When _______ is used, every subject in a study has an equal chance of being placed in
each of the groups being formed? - ✔️✔️random assignment
