(a) State the hypotheses. If you are viewing this data set as a randomized block, which is the blocking factor, and why? (b) Use Excel’s Tools > Data Analysis (or MegaStat or MINITAB) to perform the two-factor ANOVA without replication, using α = .05. (c) State your conclusions about the treatment means. (d) Interpret the p-values carefully. (e) Include a plot of the data for each group if you are using MegaStat, or individual value plots if you are using MINITAB. What do the plots show? 11.13 Concerned about Friday absenteeism, management examined absenteeism rates for the last three Fridays in four assembly plants. Does this sample prove that there is a significant difference in treatment means? Plant 1 Plant 2 Plant 3 Plant 4 March 4 19 18 27 22 March 11 22 20 32 27 March 18 20 16 28 26
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