Ttest1: Difference between revisions
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===Purpose=== | ===Purpose=== | ||
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Calculates a one sample t-test for sample (x). | Calculates a one sample t-test for sample (x). | ||
==== | ====Inputs==== | ||
* '''x''' = The name of a matrix (column vector) in which the sample data is stored. | * '''x''' = The name of a matrix (column vector) in which the sample data is stored. | ||
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* '''ttest''' = [-1,{0},1] indicates what ttest is for: | * '''ttest''' = [-1,{0},1] indicates what ttest is for: | ||
:: '''-1''' - lower tail H0: mean(x) <= mean(y) | |||
:: '''0''' - two-tail H0: mean(x) ~= mean(y) {default} | |||
:: '''1''' - upper tail H0: mean(x) >= mean(y) | |||
====Outputs==== | |||
= | |||
The output (result) a structure with the following fields: | The output (result) a structure with the following fields: | ||
Latest revision as of 15:24, 1 July 2011
Purpose
One sample t-test.
Synopsis
- result = ttest1(x,mu,test)
Description
Calculates a one sample t-test for sample (x).
Inputs
- x = The name of a matrix (column vector) in which the sample data is stored.
- mu = scalar, the null hypthesis value for the mean {default = 0}.
- ttest = [-1,{0},1] indicates what ttest is for:
- -1 - lower tail H0: mean(x) <= mean(y)
- 0 - two-tail H0: mean(x) ~= mean(y) {default}
- 1 - upper tail H0: mean(x) >= mean(y)
Outputs
The output (result) a structure with the following fields:
- t = test statistic.
- p = probability value
- mean = mean of x
- var = variance of x
- n = length of x
- se = standard error
- df = degress of freedom
- hyp = hypothesis being tested
Examples
result = ttest1(x);
result = ttest1(x,mu);
result = ttest1(x,mu,test);