ALFA ERROR, how do I calculate probability?

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To calculate the probability of obtaining a failing result for a bulk drug with a purity specification of 98.5% to 101.0% and a precision of σ = 0.92%, one must determine the z-scores for the lower and upper specification limits. Using the normal distribution, the z-scores can be calculated based on the mean purity of 100%. The probability of obtaining results outside the specified limits can then be found using standard normal distribution tables or software. The discussion concludes with the user indicating they have resolved their query.
caramuho
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Hello everybody,

I have the following situation:

A bulk drug has a purity specification of 98.5% to 101.0%. The precision for the bulk drug assay is σ = 0.92%.

How do I calculate the the probability of obtaining a failing result for those cases where the sample is in fact 100% pure? By failing result I mean a result that falls out of specification.

Thanks
 
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OK guys, I already figured it out.
 

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