Determine the number of failures that must be measured

Reference no: EM131216387

Company A manufactures computer applications boards. They are concerned with the mean time before failures (MTBF), which they regularly measure.

Denote the sample MTBF as

Determine the number of failures that must be measured before µ_Mlies within 20 % of the true µ_Mwith a 90% probability.

Assume the PDF is exponential, i.e.,

Reference no: EM131216387

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