can I get help please

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately =30.8=30.8. You would like to be 92% confident that your estimate is within 10.5 of the true population mean. How large of a sample size is required?

Do not round mid-calculation. However, use a critical z value rounded to two (2) decimal places.

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