November 28, 2015

Homework Help: Statistics

Posted by Steven on Thursday, March 28, 2013 at 6:15pm.

DM Co. sells computer parts by mail. The company claims that at least 90% of all orders are delivered on time. A sample of 150 orders showed that 129 were mailed on time. Is the company’s claim true? Test using the 2.5% level of significance. Use the 5 step procedure.

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