QUIZ CHAPTER SIX

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? • 0 • 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? • 0 • 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 • 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 • 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