... R型估计量 R-estimator R型统计量 R-statistic R型技术；R型技巧 R-technique ...
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·2,447,543篇论文数据，部分数据来源于NoteExpress
The trouble with this statistic is that America has lots of sources of R&D spending: federal money accounted for only $86 billion of the $288 billion that it spent on R&D in 2004.
不过这个数据有问题，因为美国研发支出的资金来源很多，比如2004年，研发总支出为$2880亿，而财政支出不过$860亿。
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The R-squared statistic for the relationship is practically zero, indicating no relationship between the two series.
FORBES: The Case For Higher Stock Prices After Tax Increases
The R-squared statistic for this relationship is also practically zero, again indicating no relationship.
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