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Statistic, margin of error (MOE)

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The margin of error is a statistic expressing the amount of random sampling error in the results of a survey.

MOE = z*¥ò/sqr(n)

z : z-score
¥ò : standard deviation
n : number of data

confidence level(%) : z-score

90% : 1.64
91% : 1.7
92% : 1.75
93% : 1.81
94% : 1.88
95% : 1.96
96% : 2.05
97% : 2.17
98% : 2.33
99% : 2.58

*** Âü°í¹®Çå[References] ***

https://en.wikipedia.org/wiki/Margin_of_error
https://en.wikipedia.org/wiki/Standard_normal_table
MOE = z*¥ò/sqr(n)
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