Difference between revisions of "TTest Command"
From GeoGebra Manual
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{{command|statistics}} | {{command|statistics}} | ||
;TTest[ <List of Sample Data>, <Hypothesized Mean>, <Tail> ] | ;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. | + | : 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 > ''Hypothesized Mean'' | ||
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:{{example|1=<div><code><nowiki>TTest[{1, 2, 3, 4, 5}, 3, "<"]</nowiki></code> yields ''{0.5, 0}''.</div>}} | :{{example|1=<div><code><nowiki>TTest[{1, 2, 3, 4, 5}, 3, "<"]</nowiki></code> yields ''{0.5, 0}''.</div>}} | ||
;TTest[ <Sample Mean>, <Sample Standard Deviation>, <Sample Size>, <Hypothesized Mean>, <Tail> ] | ;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}''. | + | : 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}''. |
:{{example|1=<div><code><nowiki>TTest[4, 1, 12, 4, "≠"]</nowiki></code> yields ''{1, 0}''.</div>}} | :{{example|1=<div><code><nowiki>TTest[4, 1, 12, 4, "≠"]</nowiki></code> yields ''{1, 0}''.</div>}} | ||
Revision as of 09:13, 26 August 2013
- 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
- Results are returned in list form as {Probability value, t-test statistic}.
- Example:
TTest[{1, 2, 3, 4, 5}, 3, "<"]yields {0.5, 0}.
- 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}.
- Example:
TTest[4, 1, 12, 4, "≠"]yields {1, 0}.
