James
conducts a
survey to
study the
relationship
between cell
phone use and
grades earned
during the fall
semester.
James
suspects that
there might be
a lot of other
factors that
affect grades
besides cell
phones.
Which of the
following could
be a
confounding
variable in
James's study?
Time
spent
using a
cell
phone
Grade
earned
during the
fall
,confounds the
results
between cell
phone usage
and grades.
So we can say
study time is
a confounding
variable.
CONCEPT
2
> Variables
Sam counts
how many
people came
to the local
political
meeting. He
counts 72
people, but
forgot about
the 4 people
sitting behind
him.
The percent
error in his
calculation is
.
50%
5.6%
-5.3%
, across all
cities with a
population of
more than one
million. To
prepare for
this, it refers
to the past
year's census
done by the
government.
Which
The retail brand is relying on available data because customers provide
information to the census.
The census is an example of raw data because the government provides
it.
The retail brand is relying on raw data because it has to ask for
permission to use the census.
statement
The census is an example of available data because the government
provides it.
accurately
describes the
type of data the
retail brand is
using?
RATIONALE
Since the
retailer doesn't
gather the
data itself, but
relies upon
data that has
already been
collected, this
is an example
of using
available
data.
CONCEPT
4
> Data
A student
group on a
college
conducts a
survey to
study the
relationship
between cell
phone use and
grades earned
during the fall
semester.
James
suspects that
there might be
a lot of other
factors that
affect grades
besides cell
phones.
Which of the
following could
be a
confounding
variable in
James's study?
Time
spent
using a
cell
phone
Grade
earned
during the
fall
,confounds the
results
between cell
phone usage
and grades.
So we can say
study time is
a confounding
variable.
CONCEPT
2
> Variables
Sam counts
how many
people came
to the local
political
meeting. He
counts 72
people, but
forgot about
the 4 people
sitting behind
him.
The percent
error in his
calculation is
.
50%
5.6%
-5.3%
, across all
cities with a
population of
more than one
million. To
prepare for
this, it refers
to the past
year's census
done by the
government.
Which
The retail brand is relying on available data because customers provide
information to the census.
The census is an example of raw data because the government provides
it.
The retail brand is relying on raw data because it has to ask for
permission to use the census.
statement
The census is an example of available data because the government
provides it.
accurately
describes the
type of data the
retail brand is
using?
RATIONALE
Since the
retailer doesn't
gather the
data itself, but
relies upon
data that has
already been
collected, this
is an example
of using
available
data.
CONCEPT
4
> Data
A student
group on a
college
