A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0 15 inch a Determine the minimum

Question

A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0 15 inch a Determine the minimum sample size required to construct a 99 confidence interval for the population mean Assume the population standard deviation is 0 6 inch b The sample mean is 27 6 inches With a sample size of 115 a 99 level of confidence and a population standard deviation of 0 6 inch does it seem possible that the population mean could be less than 27 7 inches Explain Click here to view page 1 of the Standard Normal Table Click here to view page 2 of the Standard Normal Table a The minimum sample size required to construct a 99 confidence interval is 106 soccer balls Round up to the nearest whole number b The 99 confidence interval for a sample size of 115 is It seem possible that the population mean could be less than 27 7 inches because values below 27 7 inches fall the confidence interval Round to two decimal places as needed

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