Axial and Bimodal Data on a Sphere.
STANFORD UNIV CALIF DEPT OF STATISTICS
Pagination or Media Count:
This paper treats method of analyzing two types of vectorial data in three dimensions. These are 1 data where a typical vector denotes a direction, i.e. has an arrowhead at one end, and where the parent population has two opposite modes and 2 data where a sample vector may be recorded in a given direction or its direct opposite, i.e. the precise direction of its arrowhead is unimportant. Such data is called axial data. The techniques are slightly more flexible than previous methods which have been proposed. Approximate tests of hypotheses are given using tables already in use with the Fisher distribution used for unimodal data. Several examples are given. The report is an expanded version of part of an earlier report Stephens, 1970.
- Statistics and Probability