Question

Find the minimum sample size for the following: A soccer ball manufacturer wants to estimate the mean circumference of soccer balls to within 0.2 of an inch. Determine the minimum sample size required to have the 90% confident interval for the population 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 :)

Answer #1

Refer Standard normal table/Z-table or use excel function
" |

Round the value to the nearest integer.

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