In this case the sample is assumed to come from a certain statistical distribution with an unknown parameter. The intention is to perform a test or calculate a confidence interval for the parameter. The p-value and the width of the confidence interval is then calculated using the appropriate summary statistics. The following distributions and parameters are available.

• Normal distribution
  • Means (standard deviation known)
  • Means (standard deviation unknown)
  • Standard deviation (mean known)
  • Standard deviation (mean unknown)
• Lognormal distribution
  • Median (shape known)
  • Median (shape unknown)
• Exponential distribution
  • Location (scale known)
  • Scale (Location known)
  • Scale (Location unknown)
• Binomial distribution
  • Proportion
  • Odds

• Hypergeometric distribution
  • Proportion
• Poisson distribution
  • Mean
  • Hazard rate
• Finite population
  • Population mean
  • Population proportion
• Bivariate normal distribution
  • Mean 2 -Mean 1
  • Standard deviation 2 / Standard deviation 1
  • Correlation coefficient
  • Regression coefficient