问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
同问 是不是c也没有错
NO.PZ2018062016000111问题如下 Whiof the following statement about two-siconfinintervis most correif the confinintervbecome narrower?A.the gree of confinis smaller.B.the gree of confinis larger.C.sampling size is smaller. A is correct.If the gree of confinis smaller, the confinintervbecome narrower.如果置信度较小，则置信区间变窄。 two sis confinintern怎么理解呢？two si confininternnarrow,那么对应中间的confininternal是不是变宽，变大呢？
NO.PZ2018062016000111问题如下Whiof the following statement about two-siconfinintervis most correif the confinintervbecome narrower?A.the gree of confinis smaller.B.the gree of confinis larger.C.sampling size is smaller. A is correct.If the gree of confinis smaller, the confinintervbecome narrower.如果置信度较小，则置信区间变窄。 那不是应该一个变大 一个变小吗？
the gree of confinis larger. sampling size is smaller. A is correct. If the gree of confinis smaller, the confinintervbecome narrower. 老师，还是没懂置信区间和置信度是什么关系
请问 gree of confin和ｃｏｎｆｉｄｅｎｃｅ ｌｅｖｅｌ 是一个东西么。那ｄｅｇｒｅｅ ｏｆ ｓｉｇｎｉｆｉｃａｎｃｅ呢
老师，想问一下这道题的B为什么不对？ 我记得课上是说“n越大，wih of confinlevel越窄”，这道题的b说的不是n变大的意思吗？ 谢谢！
