Mathematics, 02.05.2021 18:10 myohmyohmy

Determine the minimum required sample size if you want to be 95% confident that the sample mean is within 21 units of the population mean given o = 97.9. Assume the population is normally distributed.
What is the critical value that corresponds to a level of confidence of 95%?
Round your answer to two decimals.
What is the minimum sample size required for this problem?
Round your answer up to the next integer.

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Determine the minimum required sample size if you want to be 95% confident that the sample mean is...