In a manufacturing process the assembly line speed (feet per minute) was thought to affect the number of defective parts found during the inspection process. To test this theory, managers devised a situation in which the same batch of parts was inspected visually at a variety of line speeds. They collected the following data: Line Speed Number of Defective Parts Found

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In a manufacturing process the assembly line speed (feet per minute) was thought to affect the number of
defective parts found during the inspection process. To test this theory, managers devised a situation in
which the same batch of parts was inspected visually at a variety of line speeds. They collected the
following data:
Line Speed Number of Defective Parts Found
20
21
19
15
20
40
30
16
60
14
40
17
a. Develop a scatter chart with line speed as the independent variable. What does the scatter
chart indicate about the relationship between line speed and the number of defective parts
found?
b. Use the data to develop an estimated regression equation that could be used to predict the
number of defective parts found, given the line speed. What is the estimated regression
model?
Transcribed Image Text:In a manufacturing process the assembly line speed (feet per minute) was thought to affect the number of defective parts found during the inspection process. To test this theory, managers devised a situation in which the same batch of parts was inspected visually at a variety of line speeds. They collected the following data: Line Speed Number of Defective Parts Found 20 21 19 15 20 40 30 16 60 14 40 17 a. Develop a scatter chart with line speed as the independent variable. What does the scatter chart indicate about the relationship between line speed and the number of defective parts found? b. Use the data to develop an estimated regression equation that could be used to predict the number of defective parts found, given the line speed. What is the estimated regression model?
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