Elwin Osbourne, CIO at GFS, Inc., is studying employee
Question # 00501484
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Updated on: 03/17/2017 01:23 AM Due on: 03/17/2017
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Life tests performed on a sample of 13 batteries of a new model indicated: (1) an average life of 75 months, and (2) a standard deviation of 5 months. Other battery models, produced by similar processes, have normally distributed life spans. The 98% confidence interval for the population mean life of the new model is _________.
61.60 to 88.41
63.37 to 86.63
79.86 to 81.28
71.77 to 78.23
71.28 to 78.72
A large industrial firm allows a discount on any invoice that is paid within 30 days. Of all invoices, 10% receive the discount. In a company audit, 10 invoices are sampled at random. The probability that fewer than 3 of the 10 sampled invoices receive the discount is approximately_______________.
0.001
0.3486
0.057
0.1937
0.9298
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Solution: Elwin Osbourne, CIO at GFS, Inc., is studying employee