Problem 1: A shirt manufacturer buys cloth by the 100 yard roll from a supplier. For setting up a control chart to manage the irregularities (e.g., loose threads and tears) the following data was collected from a sample provided by the supplier.
SAMPLE 1 2 3 4 5 6 7 8 9 10
IRREGULARITIES 3 5 2 6 5 4 6 3 4 5
Problem 2: Determine the , Sp, UCL and LCL for a c-chart with z = 2. (Round your answers to 2 decimal places.)
Sp = ___
UCL = ___
LCL = ___
Problem 3: Suppose the next five rolls from the supplier had three, two, five, three and seven irregularities. What is the UCL? (Round your answer to 2 decimal places.)
UCL = ___