The sample mean has a normal distribution

**The average sample mean, over all possible samples, equals the population mean**

The sample mean is always very close to the population mean

The sample mean will only vary a little from the population mean

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# The sample mean is an unbiased estimator for the population mean. This means: (STA301)

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**The average sample mean, over all possible samples, equals the population mean**

The sample mean is always very close to the population mean

The sample mean will only vary a little from the population mean