If the standard deviation of the numbers -1, 0, 1, k is \({\rm{\;}}\sqrt 5 {\rm{\;}}\) where k > 0, then k is equal to:

If the standard deviation of the numbers -1, 0, 1, k is \({\rm{\;}}\sq

1.	If the standard deviation of the numbers -1, 0, 1, k is \({\rm{\;}}\sqrt 5 {\rm{\;}}\) where k > 0, then k is equal to:
A.	\(2\sqrt 6\)
B.	\(2\sqrt {\frac{{10}}{3}}\)
C.	\(4\sqrt {\frac{5}{3}}\)
D.	\(\sqrt 6\)
Answer» B. \(2\sqrt {\frac{{10}}{3}}\)