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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What is the probability that the mean price for a sample of 36 service stations is within $.05 of the population mean?
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Based upon the smaller sample of only 250 complaints, what is the probability that the sample proportion will be within .05 of the population proportion?
Customers arrive at Paul Harrold's Styling Shop at a rate of 3 per hour, distributed in a Poisson fashion. Find the average number of customers waiting for haircuts.
Suppose these figures were obtained from random samples of 36 and 45 employees, respectively. Assume population standard deviations are 1.7 and 1.4 for Canon and Pioneer, respectively, is there a significant difference in the population means? Use
A random sample of size 33 is to be selected from a population that has a mean μ = 51 and a standard deviation σ of 16. What is the probability that the sample mean will be within 6 units of the mean?
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