PROBCHI Function

PROBCHI Function

Returns the probability from a chi-squared distribution

Category: Probability

See: 'CDF Function' on page 418

Syntax

PROBCHI ( x,df <, nc >)

Arguments

x

• is a numeric random variable.

• Range: x ‰

df

• is a numeric degrees of freedom parameter.

• Range: df > 0

nc

• is an optional numeric noncentrality parameter.

• Range: nc ‰

Details

The PROBCHI function returns the probability that an observation from a chi-square distribution, with degrees of freedom df and noncentrality parameter nc , is less than or equal to x . This function accepts a noninteger degrees of freedom parameter df . If the optional parameter nc is not specified or has the value 0, the value returned is from the central chi-square distribution.

Examples

SAS Statements	Results
x=probchi(11.264,11);	0.5785813293