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1) Mean
The mean is given by the sum of the data divided by the number of data (4, in this case):
2) Standard deviation
The standard deviation is given by:
where
is the mean, that we already found at point 1), and N=4. Substituting data, we have:
The mean is given by the sum of the data divided by the number of data (4, in this case):
2) Standard deviation
The standard deviation is given by:
where