Suppose That a Process Is in a State of Control

Multiple Choice

Suppose that a process is in a state of control and we have the following information for a human weights measurement study: Average weight of males in the study = 150 lbs.
Average range of the male weights = 100 lbs.
A₂ = .577
D₃ = 0
D₄ = 2.115
What is the upper control limit for the average (mean) chart?

A) 207.7 lbs
B) 92.3 lbs
C) 361.5 lbs
D) 175 lbs