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Among adults in the US, the distribution of albumin levels in cerebrospinal uid is roughly symmetric...

Among adults in the US, the distribution of albumin levels in cerebrospinal uid is roughly symmetric with mean = 50mg=100ml and standard deviation = 12:7mg=100ml: Suppose that you select repeated samples of size 20 from this population and calculate the mean for each sample. If you were to select a large number of random samples of size 20, the sample variance of the means will be a) larger than population variance b) approximately the same as population variance c) lower than population variance

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Let X denote the albumin levels in cerebrospinal uid.

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