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8. The average grade on a Math test is 83 with a standard deviation of 5. The grades follow the Normal distribution. if the instructor assigns As to the highest Q%, what is the lowest grade that will be assigned A?
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56 12. The health of employees is monitored by periodically weighting them. A sample of 64 employees has a mean weight 174.0 Ib. Assuming that the standard deviation o is known to be 104.0 lb, use the significance level α 010 to test the claim that the population mean weight of all such mployees is less than 200 lb.
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