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March 26, 2017

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Consider a machine that fills soda bottles. The process has a mean of 15.9 ounces and a standard deviation of 0.06 ounces.

The specification limits are set between 15.8 and 16.2 ounces.

a)Compute and interpret the machine’s Cp
b)Compute and interpret the machine Cpk
c)What % of the bottles will be considered under-filled?

  • statistics - ,

    I don't know what "Cp" and "Cpk" mean. It would help to spell out these concepts. However,

    Z = (score-mean)/SD

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

    For example:

    c) Z = (15.8-15.9)/.06

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