Sheet metal screw from crown bolt

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The dataset Length.jmp contains a simple random sample of 50 stainless steel sheet metal screw from Crown Bolt, Inc., and the length of each is measured using a vernier caliper. Assume that the standard deviation of all such lengths is 0.12 in. Use a .05 significance level to test the claim that the screws have a mean length different from ¾ in, as indicated on the package labels. Do the lengths appear to be consistent with the package label? How can you tell? Write a brief paragraph to summarize your findings

Reference no: EM13490269

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