• Story Name: Food Taste Test
  • Story Topics: Consumer, Food,
  • Datafile Name: Taste Test Scores
  • Methods: Regression, Interaction, Dummy Variable, ANOVA,
  • Abstract:

    Two-way analysis of variance with two levels of each classification can be easily handled by regression analysis with dummy (0,1) variables for the two levels. The example involves food taste scores in an experiment in which a coarse and fine screen for texture and a high and low liquid level were employed in producing the food. The student should analyze the data using alternative analysis of variance models (additive vs non-additive) as well as regression models with and without the interaction (product) variable. The graph below is produced from the output of the best regression model which can also be obtained through ANOVA if the program allows specification of the model.

  • Images:
    Food Taste Test

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