问题如下：
An analyst stated that as degrees of freedom increase, a t-distribution will become more peaked and the tails of the t-distribution will become less fat. Is the analyst’s statement correct with respect to the t-distribution:
选项：
becoming more peaked?
tails becoming less fat?
No
Yes
Yes
No
Yes
Yes
解释：
C is correct.
As degrees of freedom increase, the t-distribution will more closely resemble a normal distribution, becoming more peaked and having less fat tails.
老师 什么叫做自由度增加，我激记得老师讲过x、y 自由度是说样本增加么？
