Concluding a Test for a Population Proportion

AP Statistics· difficulty 3/5

Output for a one-proportion z-test of H₀: p = 0.50 vs Hₐ: p > 0.50.

1-PropZTest prop > 0.5 z = 2.20 p = 0.0139 p̂ = 0.555 n = 400

At α = 0.05, the conclusion is:

  • A

    Accept H₀.

  • B

    Fail to reject H₀.

  • C

    Insufficient data.

  • D

    Reject H₀; convincing evidence p > 0.50.

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Explanation

P-value 0.0139 < 0.05, so reject H₀; there is convincing evidence p > 0.50.

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