Discussion:
Q: Use the data from below below then test the hypothesis that the treatment means are equal at the 0.05 significance level and (a) State the null hypothesis and alternate hypothesis, (b) What is the decision rule? (c) Compute SSA, SSE, and SST using Excel, (d) Complete a one-factor ANOVA table, and (e) State your decision regarding the null hypothesis. Does the data prove a significant difference in mean scrap rates?
Scrap rates per thousand(parts whose defects cannot be worked)and compared for 5 randomly selected days at three plants.Does the data prove a significant difference in mean scrap rates?
Scrap rate
Scrap rate(per thousand units)
PlantA PlantB PlantC
11.4 11.1 10.2
12.5 14.1 9.5
10.1 16.8 9.0
13.8 13.2 13.3
13.7 14.6 5.9