how do I solve this?
Moderator edit: Moved from Probability and Statistics subforum (see post #3).
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,
You can do this by trial and error, or look at using the numerical equation solver described in chapter 6 of the manual.
To get you started UTPT(0,1,1.7)~=0.0445655, and UTPT(0,1,1.8)~= 0.0359303, so the required solution is in the interval (1.7,1.8)