Construct a 99% confidence interval for the population mean
a biologist has found that the average weight of 12 randomly selected adult mud turtles is 8.7 lb. with standard deviation 3.6 lbs. Construct a 99% confidence interval for the population mean weight of adult mud turtles.
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Consider the case where nine persons earn $10,000 and a tenth person earns $990,000. What is their average income?
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