# Difference between revisions of "ZMeanTest Command"

From GeoGebra Manual

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;ZMeanTest[ <List of Sample Data>, <Population Standard Deviation σ>, <Hypothesized Mean>, <Tail> ] | ;ZMeanTest[ <List of Sample Data>, <Population Standard Deviation σ>, <Hypothesized Mean>, <Tail> ] |

## Revision as of 16:15, 1 January 2013

- ZMeanTest[ <List of Sample Data>, <Population Standard Deviation σ>, <Hypothesized Mean>, <Tail> ]
- Performs a one sample Z test of a population mean using the given list of sample data and the population standard deviation.
*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, Z test statistic}.

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