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The standard deviation of the weights of elephants is known to be approximately 15 pounds. We...

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. Fifty newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds.

Construct a 95% confidence interval for the population mean weight of newborn elephants. State the confidence interval. (Round your answers to two decimal places.)

  ,  



Sketch the graph. (Round your answers to two decimal places.)

CL =
  

Calculate the error bound. (Round your answer to two decimal places.)

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Homework Answers

Answer #1

Here 244 , , n = 50

Confidence interval for the population mean =

Confidence interval = 95%

Therefore, Z = 1.96

95% confidence interval for population mean

Graph

Error bound =

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