问题
单项选择题
Which of the following statements is true regarding the Student’s t-distribution, as the degrees of freedom become larger: （）
A. Confidence intervals based on the Student’s t-distribution become larger.
B. Sample sizes of the Student’s t-distribution become smaller.
C. The Student t-distribution approaches a standard normal distribution.
答案
参考答案：C
解析：
When compared to the normal distribution, the t-distribution is flatter with more area under the tails.