The second moment about the origin is μ2’ and the mean is μ, then the variance is given by

\({\sigma ^2} = {\mu _2}' + {\mu ^2}\;\)

\({\sigma ^2} = \frac{{2{\mu _2}'}}{{{\mu ^2}}}\)

\({\sigma ^2} = {\mu _2}' - {\mu ^2}\;\)

The second moment about the origin is μ2’ and the mean is μ, then

1.	The second moment about the origin is μ2’ and the mean is μ, then the variance is given by
A.	\({\sigma ^2} = \frac{{2{\mu _2}'}}{{{\mu ^2}}}\)
B.	\({\sigma ^2} = {\mu _2}' - {\mu ^2}\;\)
C.	\({\sigma ^2} = {\mu _2}' + {\mu ^2}\;\)
D.	None of the above
Answer» C. \({\sigma ^2} = {\mu _2}' + {\mu ^2}\;\)