Sampling Distributions for Sample Means

AP Statistics· difficulty 3/5

For x̄ from a population with SD = 20, going from n = 25 to n = 100 changes SE from

A
$20 to 5$
B
$20 to 10$
C
$5 to 2$
D
$4 to 2$
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Explanation

SE = σ/\sqrtn: 20/5 = 4 \to 20/10 = 2.

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