Name Multiple choice (1-point each) 1. If you knew the proportion of the curve associated with scores of 150-175 and you wanted to know the number of people with such scores, you would need to find out? a. the scores associated with 150 and 175 b. the standard deviation of the population c. the number of people in the population d. something besides the three answers above 2. When a theoretical (normal) distribution is used to assess probability, the area under the curve is considered to be: a. 0.00 b. 1.00 c. 2.00 d. any of the above are possible 3. Please do not use your table in answering this question. .3849 of the normal curve falls between / and 1.20. The proportion between # and .60 is: a. .7698 b. . 19245 c. .69245 d. not determinable from the information given 4. Given below are lower and upper limits of areas of the normal curve. Choose the limits that mark off the greatest proportion of the normal curve. a. -20to -10 b. -loto 0 c. 20to 30 d. above 30 5. A jar contains 40 red marbles and 10 black marbles. If you take a random sample of a marble from this jar, what is the probability that the marble will be red? a. 10/50 b. 40/50 c. 10/40 d. cannot be determined with the information given 6. Bud and Lou were arguing about scores on the Ace Slap-Stick Comedy Test. These scores are distributed normally with a mean of 50. They agreed that 10% of the population had scores of 60 or better (and they were correct on this). Bud also claimed that 10% of the population had scores of 40 or below. a. Bud is correct b. Bud is correct but only because each score point is worth one percentage point c. Bud is mistaken d. More information is necessary before a decision can be made. 7. Continuing the example of the Ace Slap-Stick Comedy Test, Bud claimed that, because 10% of the population had scores of 60 or better, which is 10 points from the mean, 5% must have had scores of 70 or better, because doubling the score distance always halves the percentage. a. Bud is correct b. Bud is mistaken c. More information is necessary before a decision can be made