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lyngby_ts_uttest

(export/lyngby/lyngby_ts_uttest.m)


Function Synopsis

[p, t, df] = lyngby_ts_uttest(d1, d2)

Help text

 lyngby_ts_uttest	- Student's t-test for unequal variances.

       LYNGBY_TS_UTTEST(X1, X2) gives the probability that Student's t
       calculated on data X1 and X2, sampled from distributions
       with different variances, 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_UTTEST(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
       DIFFERENT VARIANCE. Otherwise, use LYNGBY_TSTTEST.

 See also: LYNGBY_TS_TTEST, LYNGBY_TS_PTTEST.

	Date		Author		Version
       1997-06-01      Cyril Goutte    Initial Code
       1997-06-15      Peter Toft      Modified to fit lyngby + optimization

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