问题如下:
1.Based on Exhibit 1, the predicted WTI oil price for October 2015 using the linear trend model is closest to:
选项:
A.$29.15.
B.$74.77.
C.$103.10.
解释:
C is correct. The predicted value for period t from a linear trend is calculated as
[#PZMATH1338#]
October 2015 is the second month out of sample, or t = 183. So, the predicted value for October 2015 is calculated as
[#PZMATH1339#] = 28.3278 + 0.4086(183) = $103.10.
Therefore, the predicted WTI oil price for October 2015 based on the linear trend model is $103.10.
请问题干表1里面,截距和系数下面的括号里的数字(10.1846)(15.4148)是什么意思?