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MeanCI

MeanCI[list]
gives a confidence interval for the population mean estimated from list.
  • MeanCI[list] gives a confidence interval centered at Mean[list].
  • If the variance is assumed known, is based on the normal distribution.
  • If the variance is not assumed known, is based on Student's t distribution with Length[list]-1 degrees of freedom.
  • The following options can be given:
ConfidenceLevel0.95probability associated with a confidence interval
KnownVarianceNonevariance of population
A 95% confidence interval for the population mean:
Needs["HypothesisTesting`"]
A 95% confidence interval for the population mean:
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Click for copyable input
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A 99% confidence interval:
A 95% confidence interval assuming the population variance is 1: