Homework 4

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Homework 4
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CGAP SAGE liver cancer gt
normal liver
CGAP SAGE liver cancer lt
normal liver
?????????,?HCC 1648?????????? , ?????(SAGE?HCC
1648 )?????????
HCC1648 HCC (liver cancer) microarray identity
1648 transcripts with either HCC gt normal or
normal gt HCC
SAGE gene numbers HCC 1648 microarray dataset
liver cancer gt normal liver example 100 ??--??????
liver cancer lt normal liver example 200 ??--??????
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Select
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Save to your hard disc
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????
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????
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???????
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??AgtB???
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• ?????????,?HCC1648 microarray dataset????????,????
  ??(microarray?SAGE)????????

?????????????(mean1, mean2) ???(??)???if
mean1-mean2 gt 0, then the distribution of sample
1 is probably higher than the distribution of
sample 2 if mean1-mean2 lt 0, then the
distribution of sample 1 is probably lower than
the distribution of sample 2.?excel's t-test
????p-value???p-value???t-test
statisticexcel?????????????????
???????????????t-test ??????????????
??????????(mean1, mean2) ????t-test ??????
t-test ?????????????????(????)??t-test
??????????  ????? ??????
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