HP 33s - Manual (Page 272)

16–12 Statistics Programs
Program Listing:
Program Lines:
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Description
   This routine initializes the normal distribution program.

 Stores default value for mean.
 ! 
  "!  Prompts for and stores mean, M.
  Stores default value for standard deviation.
! 
 "! Prompts for and stores standard deviation, S.
! Stops displaying value of standard deviation.
Checksum and length: D72F 48

   This routine calculates Q(X) given X.

  "! % Prompts for and stores X.

 %  Calculates upper tail area.

 !  Stores value in Q so VIEW function can display it.

 #$  Displays Q(X).

!  Loops to calculate another Q(X).
Checksum and length: EA54 18

   This routine calculates X given Q(X).

  "! Prompts for and stores Q(X).

   Recalls the mean.

 ! % Stores the mean as the guess for X, called X
guess
.
Checksum and length: 79B9 12
!
  ! This label defines the start of the iterative loop.
!
 %  Calculates (Q( X
guess
)– Q(X)).
!
 . 
!
  %
!
 ! 
!
¶
!
%  Calculates the derivative at X
guess
.
!
ª !
!
ª Calculates the correction for X
guess
.