1. Psy302 Quantitative Methods
QUIZ CHAPTER SIX

2. 1. The normal distribution can be defined by its mean and ____.
mode
median
standard deviation
skewness
all of the above

3. 1. The normal distribution can be defined by its mean and ____.
mode
median
standard deviation
skewness
all of the above

4. 2. The normal distribution is also called the symmetrical, Gaussian or ____ distribution.
skewed
bi-modal
bell-shaped
point-biserial
all of the above

5. 2. The normal distribution is also called the symmetrical, Gaussian or ____ distribution.
skewed
bi-modal
bell-shaped
point-biserial
all of the above

6. 3. Scores far from the mean are located in the ________ of a normal distribution.
body
tails
most sensitive areas
most uncertain areas
a & c

7. 3. Scores far from the mean are located in the ________ of a normal distribution.
body
tails
most sensitive areas
most uncertain areas
a & c

8. 4. The unit of measurement distributed along the x-axis of a standard normal distribution is referred to as a
mean
b-score
hypotenuse
z-score
a & c

9. 4. The unit of measurement distributed along the x-axis of a standard normal distribution is referred to as a
mean
b-score
hypotenuse
z-score
a & c

10. 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
less than 0
greater than 0
exactly equal to 0
There is not enough information to answer this question.

11. 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
less than 0
greater than 0
exactly equal to 0
There is not enough information to answer this question.

12. 6. Which of the following is required to locate proportions of area under the normal curve?
Compute a z- transformation.
Find the probability of a z-score in the unit normal table.
both A and B
none of the above

13. 6. Which of the following is required to locate proportions of area under the normal curve?
Compute a z- transformation.
Find the probability of a z-score in the unit normal table.
both A and B
none of the above

14. 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? 2 4 6 8

15. 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? 2 4 6 8

16. 8. What percent of raw scores fall below the mean?
25%
50%
75%
100%

17. 8. What percent of raw scores fall below the mean?
25%
50%
75%
100%

18. 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?
-1. 0
+1.o
+6.0
-6.0

19. 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?
-1. 0
+1.o
+6.0
-6.0

20. 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 ? 2 4 6 8 10

21. 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 ? 2 4 6 8 10

22. 11. Which of the following frequency distributions if positively skewed?A A B C B C

23. 11. Which of the following frequency distributions if positively skewed?A A B C B C

24. The End