MTB > execute 'ml-11sr3.mtb'
MTB > Note. Bill Qualls - WCC - BU107
MTB > Note. Mason & Lind, Chapter 11
MTB > Note. 7th edition, page 431, Self Review 11-3
MTB >  
MTB > Note. "The net weights of a sample of bottles filled
MTB > Note. by a machine manufactured by Edne, and the net
MTB > Note. weights of a sample filled by a similar machine
MTB > Note. manufactured by Orno, Inc., are (in grams)..."
MTB >  
MTB > name c1 'Edne'
MTB > set into 'Edne'
DATA> 5 8 7 6 9 7
DATA> end
MTB >  
MTB > name c2 'Orno'
MTB > set into 'Orno'
DATA> 8 10 7 11 9 12 14 9
DATA> end
MTB >  
MTB > Note. "Test the claim at the .05 level that the
MTB > Note. mean weight of the bottles filled by the Orno
MTB > Note. manufactured machine is greater than the mean
MTB > Note. weight of the bottles filled by the Edne machine."
MTB >  
MTB > twosample-t c1 c2;
SUBC> alternate +1;
SUBC> pooled.

TWOSAMPLE T FOR Edne VS Orno
      N      MEAN     STDEV   SE MEAN
Edne  6      7.00      1.41      0.58
Orno  8     10.00      2.27      0.80

95 PCT CI FOR MU Edne - MU Orno: (-5.30, -0.70)

TTEST MU Edne = MU Orno (VS GT): T= -2.84  P=0.99  DF=  12

POOLED STDEV =       1.96

MTB >  
MTB > stop
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