Sample Tests for a Population Mean

Small Sample Tests for a Population Mean


  • There are two formulas for the test statistic in testing hypotheses about a population mean with small samples. One test statistic follows the standard normal distribution, the other Student's t-distribution.
  • The population standard deviation is used if it is known, otherwise the sample standard deviation is used.
  • Either five-step procedure, critical value or p-value approach, is used with either test statistic.