Biostatistics - Exam 1 questions well
answered to pass
Stream quality is based on the levels of many variables, including the following. Which of these variables
is quantitative?
a. The amount of phosphorous
b. The number of distinct species present
c. The amount of dissolved oxygen
d. All of the above - correct answer ✔✔d. All of the above
Select the best response: In a data set, each row corresponds to a(n)
a. individual.
b. observation.
c. value.
d. variable. - correct answer ✔✔b. observation
Which of the following is not a synonym of "individual" in statistical language?
a. Population unit
b. Observational unit
c. Database
d. Unit of observation - correct answer ✔✔c. Database
Which of the following can be defined as "the assignment of numerals to objects or events according to
rules?"
a. Data
b. Variation
c. Observation
d. Measurement - correct answer ✔✔d. Measurement
, Choose the option below that best completes the blanks in the following sentence:
For an ordinal variable, the levels of the variable are often represented by numerals. The __________ of
the numerals does not matter, but the __________ of the numerals does matter.
a. order; magnitude
b. units; measurement
c. rule; scale
d. magnitude; order - correct answer ✔✔d. magnitude; order
The EPA sends out a survey to learn about people's water usage habits. Some of the variables are
responses to the following questions. Which of these questions lead to categorical responses?
a. How many times a day do you take a shower?
b. Do you leave the water running when brushing your teeth?
c. How many times a week do you water your lawn?
d. None of the above - correct answer ✔✔b. Do you leave the water running when brushing your teeth?
Which of the following is NOT a principle of statistical thinking?
a. Data beat anecdotes
b. Where the data come from is not important
c. Conclusions are not certain
d. Variation is everywhere - correct answer ✔✔b. Where the data come from is not important
Select the best response: In a data set, each column corresponds to a(n)
a. variable.
b. observation.
c. individual.
d. value. - correct answer ✔✔a. variable
A description of different houses on the market includes the following three variables. Which of these
variables is quantitative?
answered to pass
Stream quality is based on the levels of many variables, including the following. Which of these variables
is quantitative?
a. The amount of phosphorous
b. The number of distinct species present
c. The amount of dissolved oxygen
d. All of the above - correct answer ✔✔d. All of the above
Select the best response: In a data set, each row corresponds to a(n)
a. individual.
b. observation.
c. value.
d. variable. - correct answer ✔✔b. observation
Which of the following is not a synonym of "individual" in statistical language?
a. Population unit
b. Observational unit
c. Database
d. Unit of observation - correct answer ✔✔c. Database
Which of the following can be defined as "the assignment of numerals to objects or events according to
rules?"
a. Data
b. Variation
c. Observation
d. Measurement - correct answer ✔✔d. Measurement
, Choose the option below that best completes the blanks in the following sentence:
For an ordinal variable, the levels of the variable are often represented by numerals. The __________ of
the numerals does not matter, but the __________ of the numerals does matter.
a. order; magnitude
b. units; measurement
c. rule; scale
d. magnitude; order - correct answer ✔✔d. magnitude; order
The EPA sends out a survey to learn about people's water usage habits. Some of the variables are
responses to the following questions. Which of these questions lead to categorical responses?
a. How many times a day do you take a shower?
b. Do you leave the water running when brushing your teeth?
c. How many times a week do you water your lawn?
d. None of the above - correct answer ✔✔b. Do you leave the water running when brushing your teeth?
Which of the following is NOT a principle of statistical thinking?
a. Data beat anecdotes
b. Where the data come from is not important
c. Conclusions are not certain
d. Variation is everywhere - correct answer ✔✔b. Where the data come from is not important
Select the best response: In a data set, each column corresponds to a(n)
a. variable.
b. observation.
c. individual.
d. value. - correct answer ✔✔a. variable
A description of different houses on the market includes the following three variables. Which of these
variables is quantitative?
