Hi ,

I just got a new HP50g and not sure how to solve for k.

Given P(X<k)=0.9573 .....(normal distribution)

Eg. using UTPN function for P(X<1)=0.8413:

UTPN(0,1,1)=0.1587 (ie the upper tail)

So 1-0.1587=0.8413 (ie lower tail)

Any help would be appreciated.

Thanks in advance,

Neverquit