# ZProportion2Test Command

From GeoGebra Manual

- ZProportion2Test( <Sample Proportion 1>, <Sample Size 1>, <Sample Proportion 2>, <Sample Size 2>, <Tail> )
- Performs a test of the difference between two population proportions using the given sample statistics.
*Tail*has possible values "<", ">" , "≠". These specify the alternative hypothesis as follows.- "<" = difference in population proportions < 0
- ">" = difference in population proportions > 0
- "≠" = difference in population proportions ≠ 0

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