Describing the Distribution of a Quantitative Variable

AP Statistics· difficulty 2/5

A psychologist plotted IQ scores from a random sample of 200 adults.

Which best describes the shape of this distribution?

A
$Skewed right$
B
$Uniform$
C
$Approximately symmetric and unimodal$
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D
$Bimodal$

Explanation

The bars rise to a single central peak then fall off similarly on each side — symmetric and unimodal.

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