MTB > execute 'nw2-1-2.mtb'
MTB > # Bill Qualls
MTB > # NW - Stats II - Lab 1 - #2
MTB > # This is NW2-1-2.MTB
MTB >  
MTB > # 2. Find the areas under the standard Normal ditribution for the followi
    > ng:
MTB >  
MTB > # Recall standard normal has mean=0 and stdev=1.
MTB > # The cdf instuction gives the area to the left of z.
MTB > # To get the area to the right of z, subtract cdf from 1.
MTB > # To get the area between two z scores, subtract their cdfs.
MTB > # Asign a constant to a variable starting with k: k1, k2, k3, ...
MTB >  
MTB >  
MTB > # to the right of z = 1
MTB > # Reminder: subtract cdf from 1
MTB > cdf 1
    1.0000    0.8413
MTB > let k1 = 1 - 0.8413
MTB > print k1
K1       0.158700
MTB >  
MTB >  
MTB > # to the left of z = 2
MTB > # Reminder: no other calculation needed
MTB > cdf 2
    2.0000    0.9772
MTB >  
MTB >  
MTB > # to the right of z = -0.90
MTB > # Reminder: subtract cdf from 1
MTB > cdf -0.90
   -0.9000    0.1841
MTB > let k1 = 1 - 0.1841
MTB > print k1
K1       0.815900
MTB >  
MTB >  
MTB > # between z = 1.05 and z = 2.55
MTB > # Reminder: subtract high cdf from low cdf
MTB > cdf 1.05
    1.0500    0.8531
MTB > cdf 2.55
    2.5500    0.9946
MTB > let k1 = 0.9946 - 0.9394
MTB > print k1
K1       0.0552000
MTB >  
MTB > # between z = -2.44 and z = 1.73
MTB > # Reminder: subtract high cdf from low cdf
MTB > cdf -2.44
   -2.4400    0.0073
MTB > cdf 1.73
    1.7300    0.9582
 
MTB > let k1 = 0.9582 - 0.0073
MTB > print k1
K1       0.950900
MTB >  
MTB > stop
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