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The tensile strength of a metal part is normally distributed with mean 35 pounds and standard...

The tensile strength of a metal part is normally distributed with mean 35 pounds and standard deviation 5 pounds. Suppose 40,000 parts are produced and specifications on the part have been established as 35.0+- 4.75 pounds.

Find the percentage of parts that will fail to meet specifications.

Find the number of parts that will fail to meet specifications

Find the tensile strength at which 10% of the parts exceed the upper specification limit

Math   Statistics-And-Probability   
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