Docstoc

TABLE4

Document Sample
TABLE4 Powered By Docstoc
					TABLE 4--Cluster significance tests for numbers of primibrachs and secundibrachs in
Cupulocrinus angustatus (Meek and Worthen). All tests use observed variances and are
at an alpha level of 0.05. The Student’s t values are non-central t from formulas listed in
Sneath (1977).
________________________________________________________________________
________________________________________________________________________

Comparison               Observed Critical    Critical           Decision
                                 Student’s
                         Student’s           Student’s
                                t value and t value and
                          t value
                                 maximum     minimum
                                population population
                                  overlap     overlap
________________________________________________________________________
Primibrachs of A ray      1.31  1.69, 100% 1.69, 100% Population means are not
    versus B ray                                        significantly different
Primibrachs of D ray      0.172 1.66, 100% 1.66, 100% Population means are not
    versus E ray                                        significantly different
Primibrachs of C ray      9.70  8.86, 50%   10.7, 40%   Populations overlap from
    versus A & B rays                                   40 to 50%
Primibrachs of C ray      7.96  7.22, 70%   9.29, 60%   Populations overlap from
    versus all other rays                               60 to 70%
Primibrachs of A & B      7.19  7.19, 70%   7.19, 70%   Population overlap is
    rays versus all                                     70%
    other rays

Secundibrachs of A ray    0.407 1.70, 100% 1.70, 100% Population means are not
    versus D ray                                      significantly different
Secundibrachs of A ray    1.00  1.77, 100% 1.77, 100% Population means are not
    versus E ray                                      significantly different
Secundibrachs of D ray    0.795 1.68, 100% 1.68, 100% Population means are not
    versus E ray                                      significantly different
Secundibrachs of C ray    3.97  3.67, 80%  4.42, 70%  Populations overlap from
    versus B ray                                      70 to 80%
Secundibrachs of C ray    4.34  2.88, 90%  4.51, 80%  Populations overlap from
    versus all other rays                             80 to 90%
Secundibrachs of B ray    2.80  1.77, 100% 3.14, 90%  Populations overlap from
    versus all other rays                             90 to 100%
________________________________________________________________________

				
DOCUMENT INFO