四格表资料卡方检验,当检验水平等于 0.05时,其界值是()
A.A
B.B
C.C
D.D
E.E
参考答案:B
解析:
四格表资料的自由度必定为1,当α=0.05时,
=3.84。
巴西通用的语言是[ ]
A.英语
B.西班牙语
C.葡萄牙语
D.俄语
"Even then he stood there, hidden wholly in that kindness which is night, while the uprising fumes filled the room. When the odor reached his nostrils, he quit his attitude and fumbled for the bed. ’What’s the use’ he said, weakly, as he stretched himself to rest. " The above is quoted from Theodore Dreiser’s Sister Carrie. Briefly tell the situation that leads to Hurstwood’s suicide and interpret his final words—"What’s the use".