Answer Happy

Use R for computations. An industrial engineer is investigating the effect of four assembly methods (A, B, C, D) on the assembly time for a color television component. Four operators are selected for the study. Furthermore, the engineer knows that each assembly method produces such fatigue that the time required for the last assembly may be greater than the time required for the first, regardless of the method. That is, a trend develops in the required assembly time. To account for this source of variability, the engineer uses the Latin square design shown below. Order of Assembly 1 2 3 4 Operator 2 1 3 C=10 D=14 A=7 B=6 C=18 D=11 A=5 B=10 C=9 D=10 A=10 B=12 4 B=8 A=8 D=7 C=14 1. Construct a boxplot for the treatments. Interpret the figure. 2. Analyze the data from the given experiment (a = 0.05) and draw appropriate conclusions. 3. Suppose it is believed that the average assembly time of Method C did not differ from the average assembly time of Methods B and C. Test whether this assumption is satisfied.