Question: 1. A random sample of twenty items from a normal distribution produces a sample standard deviation of 14.8. What values of the population standard deviation

1. A random sample of twenty items from a normal distribution produces a sample standard deviation of 14.8. What values of the population standard deviation are reasonable, given this result? 2. Suppose a population has a trait that is normally distributed with a variance of 200. If we want to be 99% certain that our sample mean lands within five units of the population mean, how large of a sample size do we need? How to solve these two questions

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