Statistics and Sample Size Calculation

n = N / (1 + (e^2) / N) (correct)

n = N * (1 - (e^2) / N)

n = N / (1 + N(e^2))

n = N - (e^2) / N

0.5

1.96

0.025 (correct)

0.05

85

67

76

81 (correct)

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