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Sample Size calculator for 1 Sample T Test

Hint: Use this calculator to determine the number of samples to compare the mean of a population with a standard, expected or target value.
  • The minimum acceptable probability of preventing type I error
  • The minimum acceptable probability of preventing type II error
  • This is the standard or target or the known mean
  • This is the known or estimated (from research) or the sample standard deviation
  • This is the mean of the sample (in question)
  • Minimum samples required to check if your mean is similar to the standard or reference mean