README.md

A hundred element, word-sized signed array has been stored in the data segment with starting at label IN_Data. Write a program to calculate the Variance of this array data as given in the equation. The results should be stored as Hexadecimal value in the data segment with label OUT_Data. To calculate the variance the mean should be calculated first as shown in the equation.

stat.asm

STSEG SEGMENT STACK
      DB    32 DUP(?)
STSEG ENDS
;............................
DTSEG SEGMENT
      ORG 10h
Data_IN DW  12,928,34,859,92,40,14,82,50,20
COUNT   DW  10
AVRG    DW  (?)
STNDV DD  00CDH
      ORG 30h
X_AVG DW  10 DUP(?)
;..........................
CDSEG   SEGMENT
START:
      ASSUME CS:CDSEG,DS:DTSEG,SS:STSEG
  MOV AX,DTSEG
  MOV DS,AX
  MOV AX,0000H
  MOV DI,0000H
  MOV DX,0000H
  MOV BX,0000H
  MOV SI,0000H
  MOV CX,[COUNT]
CLC_AVG: ADD AX, word ptr [Data_IN+SI]
  ADC DX, 0000H
  ADD SI,2
  LOOP CLC_AVG
  MOV CX, [COUNT]
  IDIV CX
  MOV word ptr [AVRG], AX
  MOV SI,0  
CLC_X: MOV BX,[Data_IN+SI]
  SUB BX,AX
  MOV [X_AVG+SI],BX
  ADD SI,2
  LOOP CLC_X
  MOV SI,0
  MOV BX,0000H
  MOV CX,[COUNT]
CLC_STD: MOV AX,[X_AVG+SI]
  IMUL AX
  ADD BX,AX
  ADC DI,DX
  ADD SI,2
  LOOP CLC_STD
  MOV AX,BX
  MOV DX,DI
  MOV CX,[COUNT]
  IDIV CX
  MOV WORD PTR[STNDV],AX
  MOV WORD PTR[STNDV+2],DX
  INT 3H
  ENDS
  END START