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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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.