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qnorm

The normal inverse distribution function

Calling Sequence

x = qnorm(p [,m,s])

Parameters

p

probability

m

mean (default value is 0)

s

standard deviation (default value is 1) (q,m,s can be scalar or matrix with common size)

q

real such that Prob(X<=q)=p where X is a normal variable with mean m and standard deviation s

Description

The normal inverse distribution function.

Examples

x = -5:0.1:5 ;
y = dnorm(x);
plot(x,y);
p1=0.7;
q1= qnorm(p1);
plot2d([q1;q1],[0;dnorm(q1)],1,"000")
xstring(-4,0.20,'P(X<'+string(q1)+')='+ string(p1));
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