In a Manufacturing Facility Producing Fasteners,a Supervisor Suspects That the Diameter

In a manufacturing facility producing fasteners,a supervisor suspects that the diameter of the bolt produced by the first shift workers is greater than the diameter of the bolts produced by the second shift workers.The supervisor takes a sample of 5 bolts from the first shift and a sample of 4 bolts from the second shift and measures the diameters.Below are the results from 5 first shift and 4 second shift observations.Distribution of bolt diameter measurements is not normally distributed.