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Constructing a Confidence Interval for a Population Mean

AP Statistics· difficulty 4/5

To halve a t-CI's ME, you need approximately

  • A

    4× n

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  • B

    2× n

  • C

    1/2 × n

  • D

    Same n

Explanation

SE ∝ 1/√n; halving SE means quadrupling n.

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