The carbon content (in ppm) was measured for each of six silicon wafers. The results were Assume

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The carbon content (in ppm) was measured for each of six silicon wafers. The results were

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Assume that carbon contents are normally distributed.

a. Find a 95% prediction interval for the carbon content of a single wafer.

b. Find a tolerance interval for the carbon content that contains 90% of the wafers with 95% confidence.

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