Question: For a given confidence level and sample size, which of the following is true in the interval estimation of the population mean when is known?

For a given confidence level and sample size, which of the following is true in the interval estimation of the population mean when is known? Multiple Choice If the population standard deviation is greater, the interval is narrower. If the sample standard deviation is smaller, the interval is wider. If the population standard deviation is greater, the interval is wider. If the population standard deviation is smaller, the interval is wider

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