A quality engineer is monitoring a lens coating process

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Reference no: EM13608858

A quality engineer is monitoring a lens coating process, where a lens is either a high quality lens or not a high quality lens, and the monitoring process meets the conditions for a binomial experiment. The probability a lens is a high quality lens, in the monitoring process, is 0.92, based on relative frequencies.

a) If the quality engineer tests lenses until he/she finds 3 lenses that are not a high quality lens, what is the probability the quality engineer tests exactly 21 lenses?

b) If the quality engineer tests lenses until he/she finds 3 lenses that are not a high quality lens, what is the expected number of lenses that the quality engineer tests?

c) If the quality engineer tests lenses until he/she finds 3 lenses that are not a high quality lens, what is the standard deviation of the number of lenses that the quality engineer tests?

Reference no: EM13608858

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