Beaver Brothers, Inc. is conducting a study to assess the capability of its 150-gram bar soap production line. A critical quality measure is the weight of the soap bars after stamping. The upper and lower specification limits are 162 and 170 grams, respectively. As a part of an Initial capability study, 25 samples of size 5 were collected by the quality assurance group and the observations in Table were recorded. After analyzing the data by using statistical control charts, the quality assurance group calculated the process capability ratio, Cp, and the process capability index, Cpk. It