某施工现场为及时了解新进一批DN50、长度为6m镀锌钢管的重量,随机抽检10次,数据如下(单位kg):33.4,32.8,33.5,33.4,32.9,33.2,33.1,33.3,33.5,32.9,则样本方差为()
A.0.246 B.0.247 C.0.248 D.0.249正确答案D
某施工现场为及时了解新进一批DN50、长度为6m镀锌钢管的重量,随机抽检10次,数据如下(单位kg):33.4,32.8,33.5,33.4,32.9,33.2,33.1,33.3,33.5,32.9,则样本方差为()
A.0.246 B.0.247 C.0.248 D.0.249正确答案D