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 1 6 3 8 4 6 6 2 5 8 a. Determine the c¯c¯ , Sp, UCL and LCL for a c -chart with z = 2. (Leave no cells blank – be certain to enter “0” wherever required. Round your answers to 2 decimal places.) b. Suppose the next five rolls from the supplier had three, one, four, six, and eight irregularities. Is the supplier process under control?

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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 1 6 3 8 4 6 6 2 5 8

a. Determine the c¯c¯ , Sp, UCL and LCL for a c -chart with z = 2. (Leave no cells blank – be certain to enter “0” wherever required. Round your answers to 2 decimal places.)

b. Suppose the next five rolls

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