Question

the concentration of impurities in a semiconductor used in the production of microprocessors for computer is a normally distributed random variable with mean 127 parts per million and standard deviation 22 parts per million. a semiconductor is acceptable only if its concentration of impurities is below 150 parts per million. what is the proportion of the semiconductor that are acceptable for use?​

Answer 1

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Table area values were obtained by linear interpolation.) Thus, the chance that ... A semiconductor is acceptable only if its concentration of impurities is below 150 parts per million.

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