c*o
发帖数: 70 | 1 We will need do matrix and statistics computation (e.g. matrix invert,
generate chisqure numbers etc) in C. Anyone can help us by pointing directions
to find such libraries for C or C++? Thank you a million! |
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N******n
发帖数: 3003 | 2 先用loglikelihood ratio test, 得到一个值，然后用chi square 求p value
如果是负数怎么办呢？
就是个2X2 table, 如果用fisher exact test, or hypergeometric test 很容易
如果是loglikelihood ratio, 求了半天得出一个值，然后chiSqure(1) 求Pvalue |
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c*o
发帖数: 70 | 3 We will need do matrix and statistics computation (e.g. matrix invert,
generate chisqure numbers etc) in C. Anyone can help us by pointing directions
to find such libraries for C or C++? Thank you a million! |
|
n****t
发帖数: 182 | 4 If you are intereted in a global difference between these two groups, you
should do a fisher exact test (so if any age group has a difference, you
get a small p).
If you are interested in a particular age group, you can collapse the rest
and do a fisher exact test.
For Chisqure test, your have same really small cells and violate the
assumption. But a nice thing about Chi-square is that you can also test if
there is a "trend". Considering the small sample size, if I were you, I
would collapse ... 阅读全帖 |
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