f_nftail.ihlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{* 30nov2004}{...}
{phang}
{cmd:nFtail(}{it:n1}{cmd:,}{it:n2}{cmd:,}{it:L}{cmd:,}{it:x}{cmd:)}
	returns the reverse cumulative (upper-tail, survival) noncentral
	F distribution
	with {it:n1}>0 numerator and {it:n2}>0 denominator degrees of
	freedom, noncentrality parameter {it:L}, 0{ul:<}{it:L}{ul:<}1000;
	returns 0 unless {it:x}{ul:>}0.{p_end}