Question #6300245

# What is sample standard deviation of the following data?

**data set includes:
4,6,9,11,15
_
s = sqrt [ Î£ ( xi - x )^2 / ( n - 1 ) ]
I know the formula I would be using and I also know that
_
x = 20
n= 5
but how do I find xi? I am completely stumped on this part.
**

TELL US , if you have any answer

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