Consider a population with unknown mean μand population standard deviation σ=20. (a) How large a sample size is needed to estimate μto within four units with 90 % confidence? (b) Suppose that you wanted to estimate μto within four units with 95 % confidence. Without calculating, would the sample size required be larger or smaller than that found in part (a)? (c) Suppose that you wanted to estimate μto within two units with 90 % confidence. Without calculating, would the sample size required be l
Consider a population with unknown mean μand population standard deviation σ=20. (a) How large a sample size is needed to estimate μto within four units with 90 %
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SOLVED: Oops, now you discover that the data was actually from a population! So now you must give the population standard deviation.Population Standard Deviation
SOLVED: Oops, now you discover that the data was actually from a population! So now you must give the population standard deviation.Population Standard Deviation
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Assume that farm sizes in a particular region are normallydistributed with a population standard deviation of 150 acres. Arandom sample of 50 farm sizes in this region is given below inacres. Estimate the mean farm size for this region with 90%confidence. Round your answers to two decimal places and useascending order.SizeSize2021092132131933193873200200229160486370256351770170288177165671943532962932179934149010779175620617113121884384741315620413971625376081711814091752102612
Assume that farm sizes in a particular region are normallydistributed with a population standard deviation of 150 acres. Arandom sample of 50 farm sizes in this region is given below inacres. Estimate the mean farm size for this region with 90%confidence. Round your answers to two decimal places and useascending order.SizeSize2021092132131933193873200200229160486370256351770170288177165671943532962932179934149010779175620617113121884384741315620413971625376081711814091752102612
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A sample of 81 observations is taken from a normal population with a standard deviation of 5. The sample mean is 40. Determine the 95% confidence interval for the population mean. | Numerade
A sample of 81 observations is taken from a normal population with a standard deviation of 5. The sample mean is 40. Determine the 95% confidence interval for the population mean. | Numerade
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