[Sample Data] 
Sample Size n =
Sample Proportion p̂ = 0 < p̂ < 1
[Confidence Level]
      1 - α     95% 99%
[Sampling Distribution]   Normal Distribution

    [Confidence Interval]   

zα/2 = √ p̂ (1-p̂) /n =
p̂ ±        zα/2 √ p̂ (1-p̂) /n ⇔ [    ,  ]


  n = 1 1000    1-α = 0.60 0.99