Which of the following is not true. O Short term sigma is R-bar divided by d2. Standard deviation is more sensitive and a better indicator of process variablity that the range. O Control charts that...

Extracted text: Which of the following is not true. O Short term sigma is R-bar divided by d2. Standard deviation is more sensitive and a better indicator of process variablity that the range. O Control charts that monitor the proportion of defectiive units are call u- charts. Sometimes the UCL is greater than the USL for a product. Sample size is a trade off between cost and information. O O