Exam 15: Statistical Quality Control

Table 15-1 -Refer to Table 15-1.Bags of tea are sampled to ensure proper weight.The overall average for the samples is 8 ounces.Each sample contains 10 bags.The average range is 0.1 ounces.What is the lower limit of the sample averages chart?

Which of the following control charts is/are for attributes?

Explain the difference between control charts for variables and attributes.

If we are tracking quality of performance for a class of students,we should plot the individual grades on an x-bar chart,and the pass/fail result on a p-chart.

Which of the following is not a popular definition of quality?

-charts indicate changes in

Explain the difference between a p-chart and a c-chart.

For the problems which follow,match the following. -Column 1: R-chart Column 2: Range of variables

Table 15-2 Given the sample results (100 units in each sample): -A company has been receiving complaints about the attitude of some sales clerks.Over a 10-day period,the total number of complaints was 250.The company wishes to develop a control chart for the number of complaints.What would the lower control limit on the number of complaints per day be for a 3 sigma (99.7%)control chart?

Table 15-2 Given the sample results (100 units in each sample): -A company has been receiving complaints about the attitude of some sales clerks.Over a 10-day period,the total number of complaints was 250.The company wishes to develop a control chart for the number of complaints.What would the upper control limit on the number of complaints per day be for a 2 sigma (95.5%)control chart?

The U.S.government award for quality achievement is called the ________.

A(n)________ chart is appropriate to monitor the weight of chocolate candy bars.

P-charts and c-charts are examples of control charts for variables.

Natural variation of a production process that follows a normal distribution is characterized by two parameters: ________ and ________.

Table 15-2 Given the sample results (100 units in each sample): -A company has been receiving complaints about the attitude of some sales clerks.Over a 10-day period,the total number of complaints was 250.The company wishes to develop a control chart for the number of complaints.What would the lower control limit on the number of complaints per day be for a 2 sigma (95.5%)control chart?

For the problems which follow,match the following. -Column 1: Control chart Column 2: Graphical presentation of process data

For the problems which follow,match the following. -Column 1: c-chart Column 2: Count of attributes

When a process is in control,only ________ variations exist in the process.

Match the following. -Column 1: ± 3 Column 2: Control limits for a c-chart

Table 15-1 -Refer to Table 15-1.To guarantee that cans of soda are properly filled,some cans are sampled and the amounts measured.The overall average for the samples is 12 ounces.Each sample contains 10 cans.The average range is 0.4 ounces.The lower control chart limit for the sample averages would be