考试得时候这种分位数会给个表吗？
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No.PZ2017092702000113 (选择题)
来源: 原版书
For a sample size of 17, with a mean of 116.23 and a variance of 245.55, the width of a 90% confidence interval using the appropriate t-distribution is closest to:
A
13.23.
B
13.27.
C
13.68.
