Question

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In a given manufacturing process, the speed (feet per minute) of the assembly line is believed to affect the number of defective parts found in the inspection process. To test this, managers have devised a procedure in which the same number of parts per batch is visually examined at different line speeds and performed the following scatter diagram. What can you tell them about the relationship between variables? Scatterplot of Número de partes defectu vs Velocidad de la línea 21 20 19 Número de partes defectuosas en 17 16 14 20 30 50 60 40 Velocidad de la línea Response options group A. There is no relationship between variables, speed does not influence the number of defective parts B. If there is a relationship between the variables, if the line speed increases, the number of defective parts increases. C. Yes there is a relationship between the variables, if the number of defective parts increases the line speed is constant D. If there is a relationship between the variables, if the line speed increases the number of defective parts decreases

Answer 1

Option D

Here, it seems that there is relationship between number of defective parts and speed of line,since the points on scatter plot seems to be linear.

And from scatter plot, it is observable that as speed of line increases, the number of defective parts decreases. (there is negative correlation/relationship between number of defective parts and speed of line)