Variables and measured data
Edward has created an experiment to test whether or not height has any effect on
red grade level blood cell count. Which of the following gives the explanatory and
response variables, respectively, in this situation? - ANSWER-height (explanatory)
red blood cell count(Response)
The explanatory variable is the independent variable, which is the variable that is
changed to determine its effect on a dependent or response variable. The response
variable is the variable that is being measured or tested in response to changes in
the independent variable. In this case the explanatory variable is height and the
response variable is red blood cell count.
Given that Justin is collecting data on reaction time,
what type of data is he working with? - ANSWER-continuous quantitative
Reaction time is continuous quantitative data because it is obtained by measuring
and is not limited to a certain set of numbers.
Margaret is investigating if gender has any effect on political party associations.
What is the response variable? - ANSWER-political party associations
The response variable is the dependent variable, which is the variable that is being
measured or tested in response to changes in the independent variable. In this case
the response variable is political party associations.
A new mother keeps track of the time when her baby wakes up each morning.
What is the level of measurement of the data? - ANSWER-Interval
This is interval data because time of day is a numerical scale where differences are
meaningful. However, because the time of day does not have a true zero value, it is
not ratio data.
Timothy is collecting data on the number of dental cavities.
What type of data is this? - ANSWER-discrete quantitative
The number of dental cavities is discrete quantitative data because it is obtained by
counting.
Is the statement below true or false?
, A response variable is a variable that has an effect on a study even though it is
neither an independent nor a dependent variable. - ANSWER-False
A response variable is defined as the dependent variable in an experiment.
A biologist samples and measures the length of the fish in a lake.
What is the level of measurement of the data? - ANSWER-Ratio
This is ratio data because length has a true zero, and ratios of lengths are meaningful.
Jason is collecting data on the number of books students read each year.
What type of data is this? - ANSWER-discrete quantitative
The number of books students read each year is discrete quantitative data because it
is obtained by counting.
A pollster surveys voters and asks which candidate they support in the upcoming
election.
What is the level of measurement of the data? - ANSWER-Nominal
This is nominal data because the candidates do not have an order to them. Even
though a person may have a personal preference, there is no ranking that is
universal.
Janice is investigating if grade level has any effect on time spent studying.
What is the explanatory variable? - ANSWER-grade level
The explanatory variable is the independent variable, which is the variable that is
changed to determine its effect on a dependent variable. In this case the explanatory
variable is grade level.
To determine whether or not grade level influences time spent studying, Samuel has
designed a survey.
What is the response variable? - ANSWER-time spent studying
The response variable is the dependent variable, which is the variable that is being
measured or tested in response to changes in the independent variable. In this case
the response variable is time spent studying.
What is the type of quantitative data that is the result of measuring? - ANSWER-
continuous
Edward has created an experiment to test whether or not height has any effect on
red grade level blood cell count. Which of the following gives the explanatory and
response variables, respectively, in this situation? - ANSWER-height (explanatory)
red blood cell count(Response)
The explanatory variable is the independent variable, which is the variable that is
changed to determine its effect on a dependent or response variable. The response
variable is the variable that is being measured or tested in response to changes in
the independent variable. In this case the explanatory variable is height and the
response variable is red blood cell count.
Given that Justin is collecting data on reaction time,
what type of data is he working with? - ANSWER-continuous quantitative
Reaction time is continuous quantitative data because it is obtained by measuring
and is not limited to a certain set of numbers.
Margaret is investigating if gender has any effect on political party associations.
What is the response variable? - ANSWER-political party associations
The response variable is the dependent variable, which is the variable that is being
measured or tested in response to changes in the independent variable. In this case
the response variable is political party associations.
A new mother keeps track of the time when her baby wakes up each morning.
What is the level of measurement of the data? - ANSWER-Interval
This is interval data because time of day is a numerical scale where differences are
meaningful. However, because the time of day does not have a true zero value, it is
not ratio data.
Timothy is collecting data on the number of dental cavities.
What type of data is this? - ANSWER-discrete quantitative
The number of dental cavities is discrete quantitative data because it is obtained by
counting.
Is the statement below true or false?
, A response variable is a variable that has an effect on a study even though it is
neither an independent nor a dependent variable. - ANSWER-False
A response variable is defined as the dependent variable in an experiment.
A biologist samples and measures the length of the fish in a lake.
What is the level of measurement of the data? - ANSWER-Ratio
This is ratio data because length has a true zero, and ratios of lengths are meaningful.
Jason is collecting data on the number of books students read each year.
What type of data is this? - ANSWER-discrete quantitative
The number of books students read each year is discrete quantitative data because it
is obtained by counting.
A pollster surveys voters and asks which candidate they support in the upcoming
election.
What is the level of measurement of the data? - ANSWER-Nominal
This is nominal data because the candidates do not have an order to them. Even
though a person may have a personal preference, there is no ranking that is
universal.
Janice is investigating if grade level has any effect on time spent studying.
What is the explanatory variable? - ANSWER-grade level
The explanatory variable is the independent variable, which is the variable that is
changed to determine its effect on a dependent variable. In this case the explanatory
variable is grade level.
To determine whether or not grade level influences time spent studying, Samuel has
designed a survey.
What is the response variable? - ANSWER-time spent studying
The response variable is the dependent variable, which is the variable that is being
measured or tested in response to changes in the independent variable. In this case
the response variable is time spent studying.
What is the type of quantitative data that is the result of measuring? - ANSWER-
continuous
