Refer to the data in Problem 1 concerning the tensile strengths of bolts of cloth (stored in Tensile). There is no USL for tensile strength, and the LSL is 13.
a. Estimate the percentage of bolts that are within specifications.
b. Calculate the Cp and CPL.
Problem 1: The data in Tensile represent the tensile strengths of bolts of cloth. The data were collected in subgroups of three bolts of cloth over a 25-hour period.
a. Construct a control chart for the range.
b. Construct a control chart for the mean.
c. Is the process in control?
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