I dont know how to do this question please help

It mentions at least three formulas, and implies several more. What formulas were you taught?

Once you find the formulas, show us your attempt to use them, so we have some idea how much or how little you understand.
 
sorry guy i almost forgot all the formula
I have no idea how to do it
and I cant understand what is the meaning of median and standard deviation
 
sorry guy i almost forgot all the formula
I have no idea how to do it
and I cant understand what is the meaning of median and standard deviation
If this is homework, then memory is not the issue -- just look up the formulas in your textbook, because you're supposed to be learning them.

If it is a test and you're not allowed to look it up -- then you're not allowed to ask us, either.

So what's going on here?
 
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