Manuals/calci/FISHER

FISHER(x)

• $x$ is the number.

Description

• 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=1/2 ln(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:

1. x is nonnumeric
2. x<=-1 or x>=1 .

Examples

1. FISHER(0.5642)=0.6389731838284958
2. FISHER(0)=0
3. FISHER(-0.3278)=-0.3403614004970268
4. FISHER(1)=Infinity
5. FISHER(-1)=Infinity

See Also

• CORREL
• FISHERINV

References

Bessel Function