问题如下：
Suppose you fit a range of ARMA models to a data set. The ARMA orders and estimated residual variance are
Which model is selected by the AIC and BIC if the sample size T = 250?
选项：
解释：
The ICs and the selected model in bold:
sigmaP平方的值怎么找？
NO.PZ2020011101000017 问题如下 Suppose you fit a range of ARMA mols to a ta set. The ARMA orrs anestimateresivarianσ^2\wihat\sigma^2σ2 areWhimol is selectethe AIC anBIC if the sample size T = 250? The Ianthe selectemol in bol 老师好，请问这道题是否需要进一步选择min(AIC)与min(BIC)之间最合适的？如果需要的话，需要以什么为选择标准？谢谢
NO.PZ2020011101000017 老师，能不能拿一个值举个例子，套一下公式
请问k为什么是括号里的相加，括号代表什么意思
老师，表格求出来后，黑体的AIC和BIC是怎么选择的
