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A critical process output follows a normal distribution with mean equal to 23.8 kg and standard...

A critical process output follows a normal distribution with mean equal to 23.8 kg and standard deviation equal to 1.6 kg. Engineering specifications are set at 24.0 ± 2.5 kg (This means that the lower specification limit is 21.5 cm and the upper specification limit is 26.5 cm.)

What is the current yield of the process? (The term yield means the percent falling within the specification limits.)

After an improvement project, the process standard deviation has been reduced and now equals 1.2 kg.

The mean and specifications remain the same as before. What is the resulting yield of the improved process?

Math   Statistics-And-Probability   
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