The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. 50 newborn elephants are weighed. The sample mean is 244 pounds. a/ Determine the point estimate b/ We should use a z-test or a t-test? Explain the reason you choose z-test or a t-test. c/ Find the margin of error (error bound EBM) for a 95% confidence interval for the population mean weight of newborn elephants. (You must use the formula for the margin of error EBM to solve this question. Don’t calculate the confidence interval). Round your answer to 4 decimal places.
The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. 50 newborn elephants are weighed. The sample mean is 244 pounds. a/ Determine the point estimate b/ We should use a z-test or a t-test? Explain the reason you choose z-test or a t-test. c/ Find the margin of error (error bound EBM) for a 95% confidence interval for the population mean weight of newborn elephants. (You must use the formula for the margin of error EBM to solve this question. Don’t calculate the confidence interval). Round your answer to 4 decimal places.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. 50 newborn elephants are weighed. The sample mean is 244 pounds.
a/ Determine the point estimate
b/ We should use a z-test or a t-test? Explain the reason you choose z-test or a t-test.
c/ Find the margin of error (error bound EBM) for a 95% confidence interval for the population mean weight of newborn elephants. (You must use the formula for the margin of error EBM to solve this question. Don’t calculate the confidence interval). Round your answer to 4 decimal places.
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