Question: A population has a normal distribution with unknown mean and unknown variance. Based on the material of Section 8.4, it is possible, given a random

A population has a normal distribution with unknown mean and unknown variance. Based on the material of Section 8.4, it is possible, given a random sample of two observations, to find confidence intervals for the population mean. However, this is not possible for a sample of one observation. Explain why this is to be expected.

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