Psy302 Quantitative Methods
QUIZ CHAPTER SIX
1. The normal distribution can be defined by
its mean and ____.
A. mode
B. median
C. standard deviation
D. skewness
E. all of the above
1. The normal distribution can be defined by
its mean and ____.
A. mode
B. median
C. standard deviation
D. skewness
E. all of the above
2. The normal distribution is also called
the symmetrical, Gaussian or ____
distribution.
A. skewed
B. bi-modal
C. bell-shaped
D. point-biserial
E. all of the above
2. The normal distribution is also called
the symmetrical, Gaussian or ____
distribution.
A. skewed
B. bi-modal
C. bell-shaped
D. point-biserial
E. all of the above
3. Scores far from the mean are located in
the ________ of a normal distribution.
A. body
B. tails
C. most sensitive areas
D. most uncertain areas
E. a & c
3. Scores far from the mean are located in
the ________ of a normal distribution.
A. body
B. tails
C. most sensitive areas
D. most uncertain areas
E. a & c
4. The unit of measurement distributed along
the x-axis of a standard normal distribution
is referred to as a
A. mean
B. b-score
C. hypotenuse
D. z-score
E. a & c
4. The unit of measurement distributed along
the x-axis of a standard normal distribution
is referred to as a
A. mean
B. b-score
C. hypotenuse
D. z-score
E. a & c
5. A researcher finds that the average
preschool-aged child drinks two cups of milk
per day. Assuming these data are normally
distributed, the z-score for the average
cups per day in this example is
A. less than 0
B. greater than 0
C. exactly equal to 0
D. There is not enough
information to answer
this question.
5. A researcher finds that the average
preschool-aged child drinks two cups of milk
per day. Assuming these data are normally
distributed, the z-score for the average
cups per day in this example is
A. less than 0
B. greater than 0
C. exactly equal to 0
D. There is not enough
information to answer
this question.
6. Which of the following is required to
locate proportions of area under the normal
curve?
A. Compute a ztransformation.
B. Find the probability of
a z-score in the unit
normal table.
C. both A and B
D. none of the above
6. Which of the following is required to
locate proportions of area under the normal
curve?
A. Compute a ztransformation.
B. Find the probability of
a z-score in the unit
normal table.
C. both A and B
D. none of the above
7. For a normally distributed sample of
scores with a mean of 8 and standard
deviation of 2 what is the z-score for a raw
score of 12?
A. 0
B. 2
C. 4
D. 6
E. 8
7. For a normally distributed sample of
scores with a mean of 8 and standard
deviation of 2 what is the z-score for a raw
score of 12?
A. 0
B. 2
C. 4
D. 6
E. 8
12  8
z
 2 .0
2
x
8. What percent of raw scores fall below the
mean?
A. 25%
B. 50%
C. 75%
D. 100%
8. What percent of raw scores fall below the
mean?
A. 25%
B. 50%
C. 75%
D. 100%
9. For a normally distributed sample of
scores with a mean of 8 and standard
deviation of 2, what z score corresponds to
a raw score of 6?
A. -1. 0
B. +1.o
C. +6.0
D. -6.0
E. 0
9. For a normally distributed sample of
scores with a mean of 8 and standard
deviation of 2, what z score corresponds to
a raw score of 6?
A. -1. 0
B. +1.o
C. +6.0
D. -6.0
E. 0
10. For a normally distributed sample of
scores with a mean of 8 and standard
deviation of 2, what z score corresponds to
a z-score of +1.0 ?
A. 2
B. 4
C. 6
D. 8
E. 10
10. For a normally distributed sample of
scores with a mean of 8 and standard
deviation of 2, what raw score corresponds
to a z-score of +1.0 ?
A. 2
B. 4
C. 6
D. 8
E. 10
11. Which of the
following frequency
distributions if
positively skewed?
1. A
2. B
3. C
A
B
C
11. Which of the
following frequency
distributions if
positively skewed?
1. A
2. B
3. C
A
B
C
The End