MTB > # 6.2 like
 MTB > # Using minitab find the following areas under a normal 
 MTB > # curve: mu=55 ; sigma=15
 MTB > #
 MTB > # (a) area left of x=41
 MTB > cdf x=41;
 SUBC>   normal  55 15.
    41.0000    0.1753
 MTB > # (b) area left of x=61
 MTB >  cdf x=61;
 SUBC>   normal  55 15.
    61.0000    0.6554
 MTB > # (c) area right of x=70
 MTB >    cdf x=70;
 SUBC>   normal  55 15.
    70.0000    0.8413
 MTB > # result is 1-  0.8413 
 MTB > # (d) area between 50 and 64
 MTB > cdf x=64;
 SUBC>    normal  55 15.
    64.0000    0.7257
 MTB >  cdf x=50;
 SUBC>  normal  55 15.
    50.0000    0.3694
 MTB > # area is:  0.7257 -  0.3694