# TTest Command

From GeoGebra Manual

- TTest[<List of Sample Data>,<Hypothesized Mean>,<Tail>]
- Performs a one sample T test of a population mean using the given list of sample data.
*Hypothesized Mean*is the population mean assumed in the null hypothesis.*Tail*has possible values "<", ">" , "≠". These specify the alternative hypothesis as follows.- "<" = population mean <
*Hypothesized Mean* - ">" = population mean >
*Hypothesized Mean* - "≠" = population mean ≠
*Hypothesized Mean*

- "<" = population mean <

- Results are returned in list form as {Probability value, T test statistic}.

- TTest[<Sample Mean>,<Sample Standard Deviation>,<Sample Size>,<Hypothesized Mean>,<Tail>]
- Performs a one sample T test of a population mean using the given sample statistics.
*Hypothesized Mean*and*Tail*are defined as above. Results are returned in list form as {Probability value, T test statistic}.