The distribution of the sample mean is bell-shaped or is a normal distribution.
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Yes, but that begs the question: how large should the sample size be?
The mean of a discrete probability distribution is also called the Expected Value.
A sample of 24 observations is taken from a population that has 150 elements. The sampling distribution of is
30.47
It means distribution is flater then [than] a normal distribution and if kurtosis is positive[,] then it means that distribution is sharper then [than] a normal distribution. Normal (bell shape) distribution has zero kurtosis.