In a normal distribution of scores, which of the following is true?
a. About 5 percent of the scores are more than two standard deviations from the mean.
b. The mean score is always 0.
c. Most scores are located in the two tails at either end of the distribution.
d. The standard deviation indicates the arithmetic average score.
Question 2
What does it mean if the standard deviation of a distribution of quiz grades is 0?
a.
An equal number of people received each grade (A, B, C, D, and E).
b.
The distribution is a normal, bell-shaped curve.
c.
Everyone in the class received the same grade or score.
d.
Everyone in the class received a different grade.
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