Determine mean of the sample mean
A population has mean 20. A simple random sample of size 100 is selected from this population. What is the mean of the sample mean?
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A simple random sample of size 100 is taken from a population. The population variance in unknown. The distribution of the standardised sample mean is a t-distribution. What are the degrees of freedom for this t-distribution?
A sample of size 30 from a normal population with known variance is taken. Which one of the following is most correct regarding the distribution of the standardised sample mean?
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