统计学里自由度(DF)是什么?
What are degrees of freedom (DF) in statistics?
题目类型: 技术面试题
这是一道技术面试题,常见于澳洲IT公司面试中。
难度: medium
标签: Statistics, Degrees of Freedom, t-distribution
参考答案摘要
Degrees of freedom represent the number of independent pieces of information available to estimate a parameter. For a sample variance, DF = n−1. As DF increases, the t-distribution approaches the norm...
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