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12.2: Normal Critical Values for Confidence Levels

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    5234
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    Confidence Level, C Critical Value, \(Z_{c}\)
    99% 2.575
    98% 2.33
    95% 1.96
    90% 1.645
    80% 1.28
    Table A.1: Normal Critical Values for Confidence Levels

    Critical values for \(Z_{c}\) created using Microsoft Excel


    12.2: Normal Critical Values for Confidence Levels is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by Kathryn Kozak via source content that was edited to conform to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.