TABLE 17-1
A local newspaper has 10 delivery boys who each deliver the morning paper to 50 customers every day. The owner decides to record the number of papers delivered on time for a 10-day period and construct a p chart to see whether the percentage is too erratic.

-Referring to Table 17-1, which expression best characterizes the p chart?
A) cycles
B) increasing trend
C) in-control
D) individual outliers

Question

TABLE 17-1
A local newspaper has 10 delivery boys who each deliver the morning paper to 50 customers every day. The owner decides to record the number of papers delivered on time for a 10-day period and construct a p chart to see whether the percentage is too erratic.
 
-Referring to Table 17-1, which expression best characterizes the p chart?
A) cycles 
B) increasing trend 
C) in-control 
D) individual outliers

Quizplus · Accepted Answer

The p chart is used to monitor the proportion of items in a sample that have a certain characteristic (in this case, papers delivered on time). The chart is used to determine whether the process is in control (meaning it is stable and predictable) or out of control (meaning it is unstable and producing erratic results). Since the chart shows no obvious cycles or trends, and there are no individual outliers that stand out, the best choice is C, in-control.

TABLE 17-1 A Local Newspaper Has 10 Delivery Boys Who Each Deliver