Two way ANOVA
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A consumer research group is investigating performance claims from four different detergents. The following "whiteness" readings were obtained with specifically designed equipment for 12 loads of washing distributed over three different models of washing machine. Use the five step hypothesis testing procedure to determine if there is a difference at the .05 and .01 level of significance between the performance ratings of the four detergents.
Machine 1 Machine 2 Machine 3
Detergent A 45 43 51
Detergent B 47 46 52
Detergent C 48 50 55
Detergent D 42 37 49
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Solution Summary
This solution provides a step by step method for computing test statistic for a two-way ANOVA.
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** Please see the attached file for the complete solution response **
H0: There is no significant difference in the mean performance ratings of the four detergents.
H1: There is ...
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