Question

A sample of 200 machined parts is selected from the 1-week production of a machine shop that employs three machinists. The parts are inspected to determine whether they are defective, and they are categorized according to which machine did the work. The observed counts are given in Table. We want to determine the independence of defective/nondefective classification and machinist classification at the 1% significance level. Observed (Expected) Cell Counts for Machinist A Machinist B Machinist C Defective 10 8 14 Nondefective 52 60 56 Find critical value. Use 2 decimal places.

Answer 1