Difference between revisions of "Manuals/calci/FISHER"

Revision as of 07:24, 9 December 2013

FISHER(x)

This function gives the value of Fisher transformation at $x$ .
Fisher transformation is used to test the hypothesis of two correlations.
It is mainly associated with the Pearson product-moment correlation coefficient for bivariate normal observations.
In FISHER(X), x is the number which ranges between -1 to +1.
The transformaton is defined by : $z=1/2ln(1+x/1-x)=arctanh(x)$ , where "ln" is the natural logarithm function and "arctanh" is the inverse hyperbolic function.
This function will give the result as error when:

@@ Line 2: / Line 2: @@
 *<math>x</math> is the number.
 ==Description==
-*This function gives the value of Fisher transformation at x.
+*This function gives the value of Fisher transformation at <math>x</math>.
 *Fisher transformation is used  to test the hypothesis   of two  correlations.
 *It is mainly associated with the Pearson product-moment correlation coefficient for bivariate normal observations.
 *In FISHER(X), x is the number which ranges between -1 to +1.
-*The transformaton is defined by : z=1/2  ln(1+x/1-x)= arctanh(x), where "ln" is the natural logarithm function and "arctanh" is the inverse hyperbolic function.
+*The transformaton is defined by : <math>z=1/2  ln(1+x/1-x)= arctanh(x)</math>, where "ln" is the natural logarithm function and "arctanh" is the inverse hyperbolic function.
 *This function will give the result as error when:
 #x is nonnumeric