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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