5. The Tails of theoretical normal curve a. intersect with the horizontal axis b

ID: 3128880 • Letter: 5

Question

5. The Tails of theoretical normal curve

a. intersect with the horizontal axis between the 4th and 5th standard deviation

b. intersect with the horizontal axis beyond the 5th standard deviation

c.never touch the horizontal axis

d. maintain the same distance about the horizontal axis beyond the 3rd standard deviation

6. one problem with the range (r) as a measure of dispersion is that a

a.is very difficult to calculate

b. ignores the most extreme scores

c. can be used only for nominal level vairables

d. based on the most extreme score

7. the standard normal distribution (for Z distribtion) has

a. a mean of 0 and a standard deviation of 1

b. a mean of 1 and a standard deviation of 0

c. a mean equal to the average scores and a standard deviation equal to the mean

d. mean of 1 and standard deviation of 1

8.The Z scores of the two test are +1.2 and 1.5 to obtain the area between these scores

a. subtract the z scores and find the area of the difference in the z score table

b.find the area between each score and the mean in z score table and the subtract the smaler area from the larger

c. find the area between each score and the mean in the z tables

d.find the area beyond each score in the z score table and subtract the difference in the areas from the mean

10. If the variance of a distribution is 16, and the mean is 12, and the number of cases is 24, the standard deviation is

a. 4

b. 6

c,8

d.16

5) c) never touch the horizontal axis

6) d) based on the most extreme score

7) a) mean 0 and standard deviation 1

8) b) find the area between each score and the mean in Z score table and then subtract the smaller area from the larger.

10) a) 4

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