# Statistics

Discussion in 'Math' started by sulemansarwar, May 16, 2011.

1. ### sulemansarwar Thread Starter New Member

May 16, 2011
1
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any one can help me to solve this one ....

Question 4:
An automotive engineer was investigating the difference between four assembly methods (A, B, C and D) on the time required to assemble a component. Four operators were selected for the study. The engineer suspected that the effect of fatigue would cause a trend in the time required for the assembly: whichever methods was used, the time required for the last assembly was likely to be greater than the time required for the first. He therefore designed the experiment as shown below, with results on a coded scale.

Order of Operator
assembly 1 2 3 4
1 C 10 D 14 A 7 B 8
2 B 7 C 18 D 11 A 8
3 A 5 B 10 C 11 D 9
4 D 10 A 10 B 12 C 14

(a) Identify the experimental design used. Briefly explain its advantages for this experiment and comment on any disadvantages.

(b) Analyse the data from this experiment. You can use SPSS or MINITAB for the analysis.

(c) Calculate Fisher's LSD for the difference between assembly methods and summarise the method means.