A teacher administers an exam. The exam seemed relatively easy for the students, and the majority of the scores are at the high end of the scale, although several students received low scores. In statistical terms this represents what?
(Select all that apply.)
a. Positive skew
b. Negative skew
c. Asymmetrical distribution
d. Symmetrical distribution
e. A normal curve
f. A non-normal curve
ANS: B, C, F
Any curve that is not symmetrical is referred to as skewed or asymmetrical. Skewness may be exhibited in the curve in a variety of ways. A curve may be positively skewed, which means that the largest portion of data is below the mean. A curve can also be negatively skewed, which means that the largest portion of data is above the mean. A normal curve is symmetric and has no skew.
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