An R Chart Is to Be Developed for Use in Quality

question 45

Multiple Choice

An R Chart is to be developed for use in quality control.The average of the ranges is calculated to be 0.45.The sample sizes were 9 each.What would the lower control limit be?

• A)0.8172
• B)0.6012
• C)0.0828
• D)0.1566
• E)0.7434