File SDEV.BA (BASIC source file)

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10   REM MEAN AND STANDARD DEVIATION PROGRAM
20   DIM A(50)
30   PRINT " N =  ";
40   INPUT N
50   PRINT
60   LET S=0
70   LET Q=0
80   FOR I=1 TO N
90   INPUT A(I)
100  LET S=S+A(I)
110  LET Q=Q+A(I)*A(I)
120  PRINT
130  NEXT I
140  PRINT
150  PRINT "MEAN = ";S/N
160  LET D=SQR((Q-((S*S)/N))/(N-1))
170  PRINT "SD = ";D
180  END

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