6) statistical process control (spc) is best defined as the use of ___________________(select your answer from the multiple choices below)

a) statistical methods to understand and control a process

b) statistical methods to identify and deliver manufacturing errors

c) pareto charts to determine voice of the process

d) pareto charts to understand and control a process

7) When calculating the Cp index, what does the standard deviation represent in the formula? Cp = USL - LSL/6. select answer

a) the confidence interval for the results

b) the tolerance interval

c) the range of the process

d) the variance of the index