100 REM  PLOT A NORMAL DISTRIBUTION CURVE
110 
120 DEF FNN(X) = EXP(-(X^2/2))/SQR(2*3.14159265)
130 
140 FOR X = -2 TO 2 STEP .1
150     LET Y = FNN(X)
160     LET Y = INT(100*Y)
170     FOR Z = 1 TO Y
180         PRINT " ";
190     NEXT Z
200     PRINT "*"
210 NEXT X
220 END
