*Calculates Watson's non-parametric two sample U ^{2} statistic
for circular-normal data.*

Watson's non-parametric two sample U provides
a criteria to test whether 2 samples differ significantly from each other.
The test is robust. The difference is not specified; it may be in the mean,
the angular variance, or something else.
^{2} statisticData should be two independent random samples of circular observations drawn from populations with a continuous distribution. Data should not be grouped, or if it must be grouped, class intervals should be no larger than 5 degrees. For large samples of grouped data (where there are likely to be many ties), the test may not be applicable. U Null hypothesis H |

**All Macintoshes**. System 7.x and MacOS-8 & 9 compatible.

**Price**: $75 US.

**NOTE: **This test is included as a function in VectorRose
3.0

Pierre A. Zippi

7518 Twin Oaks Court

Garland, Texas 75044

email: paz@pazsoftware.com

See also, VectorRose 3.0 calculates circular-normal statistics and creates several types of vector diagrams.

Go to: *PAZ Software Homepage*