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# lyngby_ts_ttest

## (export/lyngby/lyngby_ts_ttest.m)

### Function Synopsis

[p, t] = lyngby_ts_ttest(d1, d2)

### Help text

lyngby_ts_ttest - Two sample Student t test, equal variances.
function [p, t] = lyngby_ts_ttest(X1, X2)
Input: X1 First set of samples
X2 Second set of samples
Output: p p-values
t Student test size
lyngby_ts_ttest gives the probability that Student's t
calculated on data X1 and X2, sampled from distributions
with the same variance, is higher than observed, i.e.
the "significance" level. This is used to test whether
two sample have significantly different means.
[P, T] = lyngby_ts_ttest(X1, X2) gives this probability P and
the value of Student's t in T. The smaller P is, the more
significant the difference between the means.
E.g. if P = 0.05 or 0.01, it is very likely that the
two sets are sampled from distributions with different
means.
This works if the samples are drawn from distributions with
the SAME VARIANCE. Otherwise, use lyngby_ts_uttest.
See also: lyngby_ts_uttest, lyngby_ts_pttest

### Cross-Reference Information

This function is called by

Produced by mat2html on Wed Jul 29 15:43:40 2009

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