A random
A random sample of 225 nails in a manufacturing company is gathered. The engineer specified that the specified length of a nail must be 8 cm having a standard deviation of 0.04 cm. It shows from the sample that the average length of the nails is 8.055 cm. Do the produced nails exceed the specification of the engineer at a 1% level of significance?
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statisticsbasic operations and conceptsUnits of physical quantities
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