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Question:

Mean is 0.252, standard deviation is 0.003, permitted tolerance of 0.246 to 0.258. What percentage of washers will be discarded.

Attempt:

I am so stuck. I have looked at my text and online for hours and know that it should be fairly easy but I am getting stuck with all the equations and what the symbols mean.

Can anybody please shed some light on this topic?

Any help would be very much appreciated

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# Normal Distribution PLEASE HELP!

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