Produces micron chips for personal computers

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Reference no: EM131111122

A manufacturer produces micron chips for personal computers. From past experience the production manager believes that 1 % of the chips are defective. The company collected a sample of the first 1,000 chips manufactured after 4:00 P.M. every other day for a month. The chips were analyzed for defects, then these data and MINITAB were used to construct the p-chart shown on page 691.

a. From a statistical perspective, is a sample size of 1,000 adequate for constructing the p-chart'! Explain

b. Calculate the chart's upper and lower control limits

c. What does the p-chart suggest about the presence of special causes during the time when the data were collected?

d. Critique the rational subgrouping strategy used by the disk manufacturer.

Reference no: EM131111122

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