Question 1
The local newspaper receives several complaints per day about typographic errors. Over a seven-day period, the publisher has received calls from readers reporting the following number of errors: 4, 3, 2, 6, 7, 3, and 9. Based on these data alone, what type of control chart(s) should the publisher use?
◦
- and R-charts
◦ p-chart
◦
-chart
◦ c-chart
◦ R-chart
Question 2
A manufacturer uses statistical process control to control the quality of the firm's products. Samples of 50 of Product A are taken, and a defective/acceptable decision is made on each unit sampled. For Product B, the number of flaws per unit is counted. What type(s) of control charts should be used?
◦ p-charts for A and B
◦ c-chart for A, mean and range charts for B
◦ c-charts for both A and B
◦ p-chart for A, mean and range charts for B
◦ p-chart for A, c-chart for B
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