Restrict list to reals for statistics

Question

I get conjugates in output when running this:

Clear[X];
X:={x1,x2,x3};
Assuming[{Element[X, Reals]},StandardDeviation[X]]

What is wrong with the code?

There is nothing wrong. If x is real, is it not it own conjugate? And won't that observation mean that the result you see is correct? — m_goldberg, Dec 25 '15 at 14:59
Perhaps Assuming[{Element[X, Reals]}, StandardDeviation[X] // Simplify] is what you are looking for. — m_goldberg, Dec 25 '15 at 15:07

score 4 · Accepted Answer · answered Dec 25 '15 at 15:02

4

Simplify[StandardDeviation[X], Element[X, Reals]]

answered Dec 25 '15 at 15:02

eldo

1 Answers1