.
( Total cereal), ( ). , ( : , , ). (), (factors).
(factors)
. , ().
( ) (treatment).
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() .
(one-way analysis of variance) .
(one-way analysis of variance)
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, , , ( ). , (n-way analysis of variance). ( Total cereal ( ), ).
(n-way analysis of variance)
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, (analysis of covariance ANCOVA).
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, , , .
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(covariates)
, (ANCOVA).
t- , ( 17), . 16.1.
. ( , , , ). , ( ). , t- . , , t-. , , . , , , (dummy) . , Total cereal, .
. 16.1. (-,