Characteristics of a white noise process include

$($i$)$ Zero mean

$($ii$)$ Constant variance

$($iii$)$ Zero autocorrelations for all non$-$zero lags

$($iv$)$ Autocovariances that change over time.

Question $1$Answer

A$.$

$($i$),($ii$),$ and $($iii$)$ only

B$.$

$($ii$)$ and $($iv$)$ only

C$.$

$($i$),($ii$),($iii$),$ and $($iv$)$

D$.$

$($i$),($iii$),$ and $($iv$)$ only