8. The analyst in Dorben Company made 10 independent time studies in the hand paint spraying section of the finishing department. The product line under study revealed a direct relation between spraying time and product surface area. The fol- lowing data were collected: Study no. 1 2 3 4 5 6 8 Rating factor 0.95 1.00 00.0 1.05 0.80 1.20 200.0 1.00 0.85 0.90 de 1.00 1.10 Product surface area 170 12 150 41 130 50 120 70 105 95 Standard time 0.32 0.11 0.31 0.14 0.27 0.18 0.24 0.23 0.25 0.22 10 Compute the slope and intercept constant, using regression line equations. How much spray time would you allow for a new part with a surface area of 250 in²?

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8. The analyst in Dorben Company made 10 independent time studies in the hand
paint spraying section of the finishing department. The product line under study
revealed a direct relation between spraying time and product surface area. The fol-
lowing data were collected:
Study no.
1
2
3
4
5
7
Rating factor
0.95
1.00
200.0 1.05
0 0.80
1.20
200.0 1.00
0.85
0.90
1.00
1.10
Product surface area
170
12
150
41
130
50
120
70
105
95
Standard time
0.32
0.11
0.31
0.14
0.27
0.18
0.24
0.23
0.25
0.22
10
Compute the slope and intercept constant, using regression line equations. How
much spray time would you allow for a new part with a surface area of 250 in²?
Transcribed Image Text:8. The analyst in Dorben Company made 10 independent time studies in the hand paint spraying section of the finishing department. The product line under study revealed a direct relation between spraying time and product surface area. The fol- lowing data were collected: Study no. 1 2 3 4 5 7 Rating factor 0.95 1.00 200.0 1.05 0 0.80 1.20 200.0 1.00 0.85 0.90 1.00 1.10 Product surface area 170 12 150 41 130 50 120 70 105 95 Standard time 0.32 0.11 0.31 0.14 0.27 0.18 0.24 0.23 0.25 0.22 10 Compute the slope and intercept constant, using regression line equations. How much spray time would you allow for a new part with a surface area of 250 in²?
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