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- #announce Calculating a population correlation coefficient.
- Population Correlation Coefficients
- ===================================
-
-
- [[def4.0]] [[de This is a comment the def4.0 defines the format as floating point of field 4 ]]
- [[d n=0]]
-
-
- +----------------------------------------------------------------------------+
- | x y x^2 y^2 xy |
- +----------------------------------------------------------------------------+
- #input mac_number,,Enter the number of points
- #repeat #include correl.inc,,mac_number
- [[d n=mac_number]]
- ----------------------------------------------------------------------------
-
- [[t sx ]] [[t sy ]] [[t sxs ]] [[t sys ]] [[t sxy ]]
-
- ===========================================================================
-
-
- Population coefficient is given by sum(xy) - sum(x)*sum(y)/n
- -------------------------------------------------
- sqr[((sum(x)^2)-(sum(x)^2)/n))*((sum(y)^2)-((sum(y)^2)/n)]
-
-
- = [[o sxy ]] - [[o a= sx*sy/n]]
- ---------------------------------------
- sqr[ [[o b=sxs-((sx^2)/n)]] * [[o c=sys-((sy^2)/n)]] ]
-
- [[def5.1]]
- = [[o a=sxy-a]]
- ------------------
- [[o b=(b*c)^0.5 ]]
-
-
- [[def5.4]]
-
- = [[ a/b ]]
-