Referring to Table 18-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. What is the lower control limit for this R chart?
A) 1.34
B) 3.37
C) 4.84
D) 2.98

Question

Quizplus · Accepted Answer

The lower control limit (LCL) for an R chart is calculated using the formula LCL = D3 * R-bar, where D3 is a constant that depends on the sample size and R-bar is the average range. Without specific values for D3 and R-bar, we assume the context or table provides these, and choice A is the most likely correct answer based on typical values.

Referring to Table 18-3, Suppose the Analyst Constructs an R