1.
One hundred percent of scores fall under the area of the normal
curve.
true
false
2. A z score tells nothing about the distance of a score from
the mean.
true
false
3. A z score does NOT allow for the comparison of different
scores from different distributions
true
false
4. A number whose z score is equal to zero is equal to the
mean.
true
false
5. Which of the following is not a characteristic of the
normal distribution?
a. It is symmetrical around the mean
b. It is unimodal
c. Fifty percent of all cases fall within one standard
deviation from the mean
d. A set percentage of cases fall within a given standard
deviation from mean
6. Given the following data, convert the raw score into a
z-score: x=36, mean=30, sd=2
a. 2.4
b. 3.0
c. 2.0
d. 1.5
7. A normal curve:
a. is a theoretical ideal or model.
b. can be used to describe distributions.
c. is used in statistics for making decisions.
d. all of the above are true of the normal curve.
8. Roughly __________ of the total area under the normal curve
rests between two standard deviations above and below the
mean.
a. 68%
b. 47%
c. 99%
d. 95%
9. The average price for a new car is $18,000 and the standard
deviation is $1,500. Calculate the z scores for the following
individual scores. SHOW YOUR WORK.If X = 16,000, z =