Question

An industrial engineer employed by a beverage bottler is interested in the effects of two different types of 32-ounces bottles vs the potential fatigue differences resulted from delivering 12-bottle cases of the product. The two bottle types are glass and plastic. Two workers are used to perform the task that consists of moving 40 cases of the product 50 feet on a standard type of hand truck and then, stacking the cases in a display.

As a measured of the amount of effort required, he measured the elevation of the heart rate (BPM) induced by the task. Use a confidence level of 95%. The results follow.

Bottle type	Worker 1		Worker 2
Glass	69	75	70	63
	88	65	66	61
Plastic	74	65	63	60
	72	51	66	65

1. Estimate the factor effects. What effects appear to be larger?

2. Use the analysis of variance to compare your conclusions for part (a).

3. Analyze the residuals. Are there any obvious problem

4. Based on an analysis of main effect and interaction plots, what factor levels would you recommend using? Explain.

Answer 1