What is the formula for the subgroup range Ri This question

What is the formula for the subgroup range R_i? ________

This question pertains to SPC for quality control.

Any help would be appreciated because I can\'t find the answer in my notes or book.
What is the formula for the subgroup range R_i? ________

This question pertains to SPC for quality control.

Any help would be appreciated because I can\'t find the answer in my notes or book.

This question pertains to SPC for quality control.

Any help would be appreciated because I can\'t find the answer in my notes or book.

Solution

Subgroup range R(i) is given by:

Biggest value in subgroup i - Smallest value in subgroup i

So find the maximum and minimum values in the subgroup, and the difference will give you the subgroup range.

 What is the formula for the subgroup range R_i? ________ This question pertains to SPC for quality control. Any help would be appreciated because I can\'t find

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