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 that the population standard deviation is 0.5 inch.

b. The sample mean is 27.5 inches. With a sample size of if 84, a 99% level of confidence, and a population standard deviation of 0.5inch, does it seem possible that the population mean could be less than 27.6 inches? Explain.

Answer #1

) A soccer ball manufacturer wants to estimate the mean
circumference of soccer balls within 0.15 inch.
Determine the minimum sample size required to construct a 99%
confidence interval for the population mean. Assume that the
population standard deviation is 0.5 inch.
The sample mean is 27.5 inches. With a sample size of if 84, a
99% level of confidence, and a population standard deviation of
0.5inch, does it seem possible that the population mean could be
less than...

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a 99% level of confidence, and a population standard deviation of
0.7 inch, does it seem possible that the population mean could be
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parameter μ. Assume the population standard deviation is 0.3
inches.
Please show all work or if you used a TI 84 please explain the
necessary steps to get the answer, thank you for the help :)

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