• 2022-05-29
    设样本的观测值为-1,-2,0,1,2,则样本标准误为()设样本的观测值为-1,-2,0,1,2,则样本标准误为( )
    未知类型:{'options': ['', ' [img=20x20]17da62f3d6ff848.jpg[/img]', ' [img=31x20]17da62f3e09dee3.jpg[/img]', ' [img=31x20]17da62f3ea1bc43.jpg[/img]'], 'type': 102}