Use the following table to answer the question(s) below.

-The producers of the Yugo automobile periodically inspect samples of 80 hoods for dents and scratches. A single flaw in a hood renders it unsuitable for installation in one of their fine automobiles. The results of the last 10 samples are shown below. What are the lower and upper control limits for the np chart?
A) (-8.35, 2.8)
B) (2.8, 8.35)
C) (0.3, 17.1)
D) (8.7, 17.1)
E) (0.4, 8.7)

Question

Use the following table to answer the question(s) below.
 
-The producers of the Yugo automobile periodically inspect samples of 80 hoods for dents and scratches. A single flaw in a hood renders it unsuitable for installation in one of their fine automobiles. The results of the last 10 samples are shown below. What are the lower and upper control limits for the np chart?
A) (-8.35, 2.8) 
B) (2.8, 8.35) 
C) (0.3, 17.1) 
D) (8.7, 17.1) 
E) (0.4, 8.7)

Quizplus · Accepted Answer

The np chart control limits are calculated using the formula: np ± 3√(np(1-p)), where n is the sample size and p is the proportion of defective items. The given options suggest that the correct limits are (0.3, 17.1).

Use the Following Table to Answer the Question(s) Below