Question: A large population is normally distributed with a standard deviation of 0.12. A random sample will be taken from this population and the sample

A large population is normally distributed with a standard deviation of 0.12.

A large population is normally distributed with a standard deviation of 0.12. A random sample will be taken from this population and the sample mean will be calculated. We require at least 98% confidence that the true population mean will be within 0.05 of the sample mean, assuming there is no systematic error. What sample size is required?

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