s=sample standard deviation
s=square root (Sum(x-(xbar))2 /(n-1)
Computing formula (so you don't have to find the mean and the distance from the mean over and over):
square root(Sxx /(n-1))
Sxx= Sum(x2) - ((Sum(x))2/n)
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z=x-mean / sd
s^2x
all statistics are numerical statement but all numerical statement s of are not statistics explain
It is the estimate for s, the sample standard deviation.
No, but the source(s) for all statistics quoted or used must be given.