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Convert confidence levels to z critical values and margin of error.
Confidence Level Z Value Tool maps a confidence level to the corresponding normal critical z-value and can combine it with population standard deviation and sample size. Use it when building normal-theory margins of error or checking confidence-interval inputs.
Enter the confidence level.
Alpha: 5.0000%
Critical z*: 1.959964
Margin of error: 2.939946
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