49
ECOM II
The fitted equation is of the form:
Species abundance (y) = b0 + b1*Environment 1 + b2*Environment 2 +............
bk*Environment k,
where b0, b1,b2.....bk are the fitted parameters.
The upper part of the output grid gives the estimated parameters, their standard
error, the Student t value and its estimated probability. To be significant at the 5%
level a parameter should have a probability < 0.05.
The lower part of the grid gives the Analysis of variance table, the F value and its
probability. The regression explains a significant part of the variation in species
number at the 5% level if the probability value is < 0.05.
Pearson correlations between any two variables (biological or environmental) can be
obtained from the scatter plot tab   see 
Scatter Plot
.
8.1
Scatter Plot
The scatter plot allows you to plot two and three dimensional graphs of any variables
from either the biological or environmental working data grids.
The variables for plotting are selected using the panel below the graph. For each axis,
radio buttons are offered to allow the selection of variables from either the biological
or environmental working array. The variable is selected from the drop down lists.
Copyright 2004  PISCES Conservation Ltd





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