Data were collected from a sample provided by the supplier

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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 (i.e. loose threats and tears), the following data were 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

Using these data, set up a c-chart with z = 2.

Suppose the next five rolls from the supplier had 3, 2, 5, 3, and 7 irregularities. Is the supplier’s process under control?

Reference no: EM13785865

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