JohnniesAreBest is the maker of a certain cereal. Consumer reports has just published an article that shows that they
frequently have less than 16 ounces of cereal in a box. Let’s assume that the government says that they must be within ± 5
percent of the weight advertised on the box. TommiesAreBest goes out and buys 1,000 boxes of cereal and find that they weigh
an average of 15.875 ounces with a standard deviation of .529 ounces.
a. Calculate the Process Capability Index
b. What does this Cpk mean?
c. What is the probability of JohnniesAreBest producing a defective product?
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