# Question: A control chart is used to control the fraction nonconforming

A control chart is used to control the fraction nonconforming for a plastic part manufactured in an injection molding process. Ten subgroups yield the data in Table 7E.9.

(a) Set up a control chart for the number nonconforming in samples of n = 100.

(b) For the chart established in part (a), what is the probability of detecting a shift in the process fraction nonconforming to 0.30 on the first sample after the shift has occurred?

(a) Set up a control chart for the number nonconforming in samples of n = 100.

(b) For the chart established in part (a), what is the probability of detecting a shift in the process fraction nonconforming to 0.30 on the first sample after the shift has occurred?

## Relevant Questions

A control chart for fraction nonconforming indicates that the current process average is 0.03. The sample size is constant at 200 units. (a) Find the three-sigma control limits for the control chart. (b) What is the ...Tale 7E.1 contains data on examination of medical insurance claims. Every day 50 claims were examined. (a) Set up the fraction nonconforming control chart for this process. Plot the preliminary data in Table 7E.1 on the ...A banking center has instituted a process improvement program to reduce and hopefully eliminate errors in their check processing operations. The current error rate is 0.01. The initial objective is to cut the current error ...Consider an np chart with k-sigma control limits. Derive a general formula for determining the minimum sample size to ensure that the chart has a positive lower control limit. Consider the data in Exercise 7.53. Suppose a new inspection unit is defined as 2,500 m of wire. (a) What are the center line and control limits for a control chart for monitoring future production based on the total number ...Post your question