Question: 17) When selecting, with replacement, a simple random sample of 3 observations from a population of 7 observations, the number of possible samples you can

17)When selecting, with replacement, a simple random sample of 3 observations from a population of 7 observations, the number of possible samples you can select is ____.

2)A population consists of 3 numbers: 2, 10 and 6. You randomly select a sample of 2 observations without replacement and calculate the sample mean. The variance of the sample mean is _____.

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