Periodically, a sample of 20 items are randomly selected from a population that is normally distributed, the average is computed, and plotted. Which of the following statements is correct?
. The average of the logarithms of the values is lognormally distributed.
. The standard deviation of the averages is equal to the standard deviation of the individuals divided by the square root of 20.
. The variance of the averages is equal to the variance of the individuals divided by the square root of 20.
Erick
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