单选题
编号：2692060
1. Compared to a t-distribution with 10 degrees of freedom, and compared to a normal distribution, a t-distribution with 20 degrees of freedom and the same variance has:
Compared to df = 10 Compared to normal
- A.Thinner tails fatter tails
- B.Fatter tails thinner tails
- C.Fatter tails fatter tails