A major airline is interested in monitoring customer satisfaction with its baggage handling process. To do so, each day the airline randomly selects 100 customers and surveys them to determine if they are satisfied or not with the service provided. After 20 samples, a total of 260 unsatisfied customers were counted. The lower and upper control limits for the appropriate control chart for these data are
A) 0.029 and 0.231.
B) 0 and 0.145.
C) 0.0964 and 0.1363.
D) 0 and 0.4236.
E) 0 and 0.356.

Question

Quizplus · Accepted Answer

The correct answer is A because the lower and upper control limits for the appropriate control chart for these data are 0.029 and 0.231, respectively. This is calculated using the formula:UCL = p + 3 * sqrt(p * (1 - p) / n)LCL = p - 3 * sqrt(p * (1 - p) / n)where p is the sample proportion and n is the sample size. In this case, p = 260 / 2000 = 0.13 and n = 100. Plugging these values into the formula, we get:UCL = 0.13 + 3 * sqrt(0.13 * (1 - 0.13) / 100) = 0.231LCL = 0.13 - 3 * sqrt(0.13 * (1 - 0.13) / 100) = 0.029

A Major Airline Is Interested in Monitoring Customer Satisfaction with Its