Question: Consider a process under statistical quality control. The upper specification limit of the statistic of interest is 1 0 5 , while the lower specification

Consider a process under statistical quality control.

The upper specification limit of the statistic of interest is

105,

while the lower specification is

49 .

The sample plan is for

7

samples per period.

The average range of the process is

15 .

What is the appropriate capability of the process assuming it is centered exactly between the specification limits and the statistic of interest has a normal distribution?

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