Appendix A.28

Sample Proportion Calculator

Calculate probabilities for sample proportions using the sampling distribution.

Population Proportion (p)

Sample Size (n)

Sample Proportion (p̂)

Probability Type

Normal Approximation Valid

np(1-p) = 21.00 ≥ 10 ✓

:0.3000

:0.0458

Z-score:-1.0911

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Probability

0.137617

P(p̂ < 0.25)

Z-Score Calculation