The Geometric Distribution

AP Statistics· difficulty 4/5

X is Geometric with p = 0.4.

Compute the SD of X. (sigma = sqrt((1-p)/p^2))

A
$\approx 2.50$
B
$\approx 1.94$
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C
$\approx 0.60$
D
$\approx 1.50$

Explanation

SD = sqrt(0.6/0.16) = sqrt(3.75) \approx 1.94.

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