b Compute the Anova wih statistical software and using the 0

b) Compute the Anova wih statistical software and, using the .05 significance level, test the interaction effect of brand and cycle time on \"dirt removed\"

Solution

Two factor ANOVA Factor 2 Means: 18 min 20 min 22 min 24 min a 0.120 0.115 0.180 0.165 0.145 Factor 1 b 7.050 0.145 0.175 0.190 1.890 c 0.165 0.145 0.185 0.200 0.174 d 0.110 0.125 0.160 0.160 0.139 1.861 0.133 0.175 0.179 0.587 2 replications per cell ANOVA table Source SS    df MS F    p-value Factor 1 18.1190 3 6.03967 1.00 .4181 Factor 2 17.3336 3 5.77785 0.96 .4369 Interaction 53.6837 9 5.96486 0.99 .4859 Error 96.6076 16 6.03798 Total 185.7439 31