Reconsider the data in Problem 5-6. Suppose that both factors, machines and operators. are chosen at random.

(a) Analyze the data from this experiment.

(b) Find point estimates of the variance components using the analysis of variance method.

Problem 5-6.

An article in the Journal of Quality Technology (Vol. 13, No. 2, 1981, pp. 111-114) describes an experiment that investigates the effects of four bleaching chemicals on pulp brightness. These four chemicals were selected at random from a large population of potential bleaching agents. The data are as follows:

 

Transcribed Image Text:

Chemical Pulp Brightness 74.466 92.746 76.208 82.876 1 77.199 79.306 81.914 80.346 73.385 2 80.522 78.017 91.596 80.802 80.626 79.417 78.001 78.358 77.544 77.364 77.386 44