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What is the advantage of statistical methods?

(a) Increase the value of (Quality/cost)

(b) Increase the value of (Cost/Quality)

(c) Decrease the value of (Cost * Quality)

(d) Increase the value of (Cost * Quality)

This question was posed to me in homework.

The query is from Evaluating Uncertainty in Measurement in chapter Evaluating Uncertainty in Measurement of Engineering Metrology

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The correct answer is (a) Increase the value of (Quality/cost)

Best explanation: The value of (Quality/cost) increases with the help of statistical methods which means offer same quality at low cost or good quality at same cost or both i.e. better quality and less cost. Convention approach which is based upon random errors for evaluating the uncertainty of measurement follow the statistical methods.

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