The Tiliche Corp. analyst conducted 10 independent timing studies in the manual spray painting section of the finishing department. The product line under study revealed a direct relationship between spray painting time and product surface area. The following data were collected (ignore the rating factor): (image) To answer: (a) Find the linear model relating standard time (y) to surface area (x) using linear regression. b) How much time would you assign to spray painting a new part with a surface area of 250 in2? c) Obtain the fitted value of y and the corresponding residual for a particular assembly (study #3) with a surface area of 150 square inches.
The Tiliche Corp. analyst conducted 10 independent timing studies in the manual spray painting section of the finishing department. The product line under study revealed a direct relationship between spray painting time and product surface area. The following data were collected (ignore the rating factor):
(image)
To answer:
(a) Find the linear model relating standard time (y) to surface area (x) using linear regression.
b) How much time would you assign to spray painting a new part with a surface area of 250 in2?
c) Obtain the fitted value of y and the corresponding residual for a particular assembly (study #3) with a surface area of 150 square inches.
Note:
The exercise in the image is the original, it is in Spanish, but it is easy to understand.
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