In the series of scores: 4, 4, 5, 7, the number 5 is:
a. The mean.

b. The mode.

c. The median.

d. None of the above.
In the series of scores: 4, 4, 5, 7, the number 4.5 is:
a. The mean.

b. The mode.

c. The median.

d. None of the above.

 

In the series of scores: 4, 4, 5, 7, the number 4 is:

a. The mean.

b. The mode.

c. The median.

d. None of the above.

If the mean is 130 and the median is 140, it seems likely that the:

a. Mode will fall in between.

b. Distribution is bimodal.

c. Distribution is positively skewed.

d. Distribution is negatively skewed.

The most widely used measure of central tendency is the:

a. Mean.

b. Median.

c. Mode.

d. Mean and Median see about equal use.

The values of three out of a sample of four deviation scores are: -5, +2, and -3. The value of the fourth deviation score is:

a. 0

b. +6

c. +3

d. +8

For the two scores 2 and 4, (?X)2

a. 2

b. 6

c. 20

d. 36

The mean score on a quiz is 7 and the standard deviation is 0. This shows that:

a. The range is 7.

b. The distribution is normal.

c. The variance is also 7.

d. All persons scored 7.

A z score in a given distribution is -.5. If the mean of this distribution is 130 and the standard deviation is 20, the equivalent raw score in that distribution is:

 

a. 129.5

b. 120

c. 110

d. 140

Three scores in a distribution are 20, 25, and 35. The z-score equivalents of the first two are, respectively, -1 and -1/2. The z-score equivalent of the third score:

a. Is 0.

b. Is +1/2.

c. Is +1.

d. Cannot be determined from the above information
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