Frank Pianki, the manager of an organic yogurt processing plant desires a quality specification with a mean of 20.0 ounces, an upper specification limit of

20.9 ounces, and a lower specification limit of 19.1 ounces. The process has a mean of 20.0 ounces and a standard deviation of 1.25 ounce.

Part 2

The process capability index

(Cpk) = ?

(round your response to three decimal places).