Question: true or false? Consider an ARMA(1,1) model, X_t - phi*X_{t-1} = Z_t + theta*Z_{t-1} where {Z_t} ~ WN(0, sigma squared). If phi_1 = theta_1, then

true or false? Consider an ARMA(1,1) model, X_t - phi*X_{t-1} = Z_t + theta*Z_{t-1} where {Z_t} ~ WN(0, sigma squared). If phi_1 = theta_1, then the process reduces to a white noise series

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