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The Central Limit Theorem

AP Statistics· difficulty 4/5

A common rule of thumb for the CLT to apply to x̄ is

  • A

    n ≥ 100

  • B

    n ≥ 5

  • C

    n ≥ 30 (or population already normal)

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  • D

    Any n

Explanation

n ≥ 30 is the conventional threshold; smaller n needed if population is itself normal.

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