Confidence maximum error of estimate-confidence interval

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Reference no: EM13104347

A machine produces parts with lengths that are normally distributed with ? = 0.59. A sample of 19 parts has a mean length of 76.26.

a) Find the 90% confidence maximum error of estimate for ?. (To 3 decimal places.)

b) Find the 90% confidence interval for ?. (To three decimal places.)

Lower Limit

Upper Limit

Reference no: EM13104347

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