Question

a quality control engineer monitors extrusion unit weights. the greatest decrease in unit weight occurred between which two extrusion numbers? a. 1 and 2 b. 4 and 5 c. 10 and 11 d. 14 and 15

Explanation:

Step1: Find weight at each interval start

Read weights from the graph for each option's starting - extrusion number.
For A: At extrusion 1, weight is 7.5 lb.
For B: At extrusion 4, weight is 7.0 lb.
For C: At extrusion 10, weight is 8.5 lb.
For D: At extrusion 14, weight is 7.5 lb.

Step2: Find weight at each interval end

Read weights from the graph for each option's ending - extrusion number.
For A: At extrusion 2, weight is 6.8 lb. Decrease is \(7.5 - 6.8=0.7\) lb.
For B: At extrusion 5, weight is 7.5 lb. Increase, so not valid.
For C: At extrusion 11, weight is 7.7 lb. Decrease is \(8.5 - 7.7 = 0.8\) lb.
For D: At extrusion 15, weight is 7.3 lb. Decrease is \(7.5 - 7.3=0.2\) lb.

Answer:

C. 10 and 11