Transcript (5) other test sections received no wax. After 3 weeks, the number of

Dr. Imanut wants to examine whether a new drug
increases the maze running performance of older
rats. Dr. Imanut teaches two groups of older rats to find a
piece of tasty rat chow in the maze. One group of rats is
given the new drug while they are learning the maze. The
second group is not given the drug. One week after
having learned the maze he retests the rats and records
how long it takes them to find the rat chow.
1. The independent variable:
a)
b)
c)
d)
age of the rats.
type of maze.
length of time it took the rats to run the maze.
presence or absence of the new drug.
Dr. Imanut wants to examine whether a new drug
increases the maze running performance of older
rats. Dr. Imanut teaches two groups of older rats to find a
piece of tasty rat chow in the maze. One group of rats is
given the new drug while they are learning the maze. The
second group is not given the drug. One week after
having learned the maze he retests the rats and records
how long it takes them to find the rat chow.
2. The dependent variable:
a)
b)
c)
d)
age of the rats.
type of maze.
length of time it took the rats to run the maze.
presence or absence of the new drug.
Dr. Imanut wants to examine whether a new drug
increases the maze running performance of older
rats. Dr. Imanut teaches two groups of older rats to find a
piece of tasty rat chow in the maze. One group of rats is
given the new drug while they are learning the maze. The
second group is not given the drug. One week after
having learned the maze he retests the rats and records
how long it takes them to find the rat chow.
3. The control is:
a)
b)
c)
d)
group that is given the drug.
group that is not given the drug.
the size of the rats.
the age of the rats.
A researcher wanted to study the effects of sleep
deprivation on physical coordination. The researcher
selected 25 year-old male college students and deprived
some of the subjects to either 24, 36, or 45 hours of sleep.
4. The independent variable is:
a)
b)
c)
d)
the length of time the subjects were deprived of sleep.
age of the subjects.
the gender of the subjects.
the physical coordination skills of the subjects.
A researcher wanted to study the effects of sleep
deprivation on physical coordination. The researcher
selected 25 year-old male college students and deprived
some of the subjects to either 24, 36, or 45 hours of sleep.
5. The dependent variable is:
a)
b)
c)
d)
the length of time the subjects were deprived of sleep.
age of the subjects.
the gender of the subjects.
the physical coordination skills of the subjects.
A researcher wanted to study the effects of sleep
deprivation on physical coordination. The researcher
selected 25 year-old male college students and deprived
some of the subjects to either 24, 36, or 45 hours of sleep.
6. The control would be:
a)
b)
c)
d)
25 year old students that participate in collegiate
athletics.
how old the students are.
25 year old male students without sleep deprivation.
the physical coordination skills of the subjects.
A shopping mall wanted to determine whether the more
expensive “Tough Stuff” floor wax was better then the
cheaper “Steel Seal” floor wax at protecting its floor tiles
against scratches. One liter of each brand of floor wax
was applied to 5 test sections of the main hall of
the mall. The test sections were all the same size and
were covered with the same kind of tiles. Five (5) other
test sections received no wax. After 3 weeks, the number
of scratches in each of the test sections was counted.
7. The independent variable:
a)
b)
c)
d)
one liter of floor wax
test sections that received no wax
different brand of floor wax
how many scratches were in the tiles after 3 weeks
A shopping mall wanted to determine whether the more
expensive “Tough Stuff” floor wax was better then the
cheaper “Steel Seal” floor wax at protecting its floor tiles
against scratches. One liter of each brand of floor wax
was applied to 5 test sections of the main hall of
the mall. The test sections were all the same size and
were covered with the same kind of tiles. Five (5) other
test sections received no wax. After 3 weeks, the number
of scratches in each of the test sections was counted.
8. The dependent variable:
a)
b)
c)
d)
one liter of floor wax
test sections that received no wax
different brand of floor wax
how many scratches were in the tiles after 3 weeks
A shopping mall wanted to determine whether the more
expensive “Tough Stuff” floor wax was better then the
cheaper “Steel Seal” floor wax at protecting its floor tiles
against scratches. One liter of each brand of floor wax
was applied to 5 test sections of the main hall of
the mall. The test sections were all the same size and
were covered with the same kind of tiles. Five (5) other
test sections received no wax. After 3 weeks, the number
of scratches in each of the test sections was counted.
9. The control:
a)
b)
c)
d)
the size of the tiles
test sections that received no wax
different brand of floor wax
how many scratches were in the tiles after 3 weeks