# TITLE:  Normal Distribution Enhancement
# AUTHOR: Roy F.A. Maclean 
# EMAIL:  rfamgm at gmail
# WEB:    http://www.spiderpixel.co.uk/caspro        
# DATE:   5Dec1994
# MAKE:   CASIO
# MODEL:  fx7700G or greater
# SIZE:   127
# NOTES:  The P( and R( in this program are one symbol, not a 'P' 
#         followed by a'('.
#         The calculator needs to be in stats mode while typing in
#         the program in order to access these symbols.
#         
#         It asks for the  mean and standard deviation (M & S)
#         It then gives you a menu of three types of events
#         that it can work out the probability of. Type 1,2 or 3.
#         If 3 then it will ask you for A & B.
#         Finally it will display the requested probability.


@@ Program 1

Lbl 0:"M"?->M:"S"?->S
"1: X<=x"
"2: X>=x"
"3: A<=X<=B"?->C
C=3=>Goto 1
"X"?->X:(X-M)/S->D
C=1=>Graph Y=P(D)_
C=2=>Graph Y=R(D)_
Goto 0
Lbl 1
"A"?->A:"B"?->B
P((B-M)/S)-P((A-M)/S)