A manufacturer buys some parts and makes some parts for its assemblies. The supplier of the purchased parts aims to always meet the specs. The supplier conducts inspections before shipping. They checked 25 samples, each containing 5 parts and found the following results: Xdoublebar = 0.3175cm Rbar = 0.00508cm 1. What is the probability that a sample with a mean of 0.305 would be out of control?