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Statistics LibreTexts

Normal Critical Values for Confidence Levels

  • Page ID
    5234
  • 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