Question: A Quality Analyst wants to construct a mean control chart for determining whether three machines, all producing the same product, are in control with regard

A Quality Analyst wants to construct a mean

A Quality Analyst wants to construct a mean control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he randomly picked four units of output from each machine, with the following results: Machine #1 #2 17 16 Measurements 15 15 25 18 24 23 17 25 22 #3 23 What is the sample size (i.e., number of units/items in each sample)? [Hint: Each row is a sample. There are three samples. Each sample has 4 items.]

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