3. Assume the weights of adult male pygmy-possums in Australia are normally distributed with a mean...
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3. Assume the weights of adult male pygmy-possums in Australia are normally distributed with a mean of 8.5 g and a standard deviation of 0.3 g. (a) Identify the population and the variable. Population: Variable: (b) For samples of size four, find the mean ay and standard deviation o, of all possible sample mean weights. Mean of &: Standard Deviation of &: (c) Find the percentage of all samples of four pygmy-possums that have mean weights within 0.5 g of the population mean weight of 8.5 g. 4. Assume the serum cholesterol levels in men age 18-24 are normally distributed with a mean of 178.1 and a standard deviation of 40.7. (Units are mg/100 ml., and the data are based on the National Health Survey.) (a) Suppose 64 men age 18-24 are randomly selected. Find the probability their mean serum cholesterol level is greater than 185. (b) If the serum cholesterol levels in men age 18-24 are not normally distributed, can you answer part (a)? Why or why not? (You must justify your answer to receive credit. Be specific.) 3. Assume the weights of adult male pygmy-possums in Australia are normally distributed with a mean of 8.5 g and a standard deviation of 0.3 g. (a) Identify the population and the variable. Population: Variable: (b) For samples of size four, find the mean ay and standard deviation o, of all possible sample mean weights. Mean of &: Standard Deviation of &: (c) Find the percentage of all samples of four pygmy-possums that have mean weights within 0.5 g of the population mean weight of 8.5 g. 4. Assume the serum cholesterol levels in men age 18-24 are normally distributed with a mean of 178.1 and a standard deviation of 40.7. (Units are mg/100 ml., and the data are based on the National Health Survey.) (a) Suppose 64 men age 18-24 are randomly selected. Find the probability their mean serum cholesterol level is greater than 185. (b) If the serum cholesterol levels in men age 18-24 are not normally distributed, can you answer part (a)? Why or why not? (You must justify your answer to receive credit. Be specific.)
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Related Book For
Statistics for Business and Economics
ISBN: 978-0132930192
8th edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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