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Parameters for a Binomial Distribution

AP Statistics· difficulty 4/5

For X∼X \sim Binomial(n=20,p=0.3)(n=20, p=0.3), the standard deviation is approximately

  • A

    2.052.05

    check_circle
  • B

    0.210.21

  • C

    4.24.2

  • D

    66

Explanation

Var = np(1-p) = 20·0.3·0.7 = 4.2; σ = √4.2 ≈ 2.05.

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