两组样本间的显著性检验
http://blog.sina.com.cn/s/blog_13ec735f50102wu82.html
有显著性差异才可以出现象明显
https://stackoverflow.com/questions/20682795/is-there-a-python-t-test-for-difference
如何理解数据差异的显著性检验 ？知乎
http://onlinestatbook.com/mobile/tests_of_means/difference_means.html
视频讲解Two-sample t test for difference of means
具体算法 Confidence Interval for t-test (difference between means) in Python
http://benalexkeen.com/comparative-statistics-in-python-using-scipy/
from scipy import stats
stats.ttest_ind(female_doctor_bps, male_consultant_bps)
工作日 非工作日
/data/c03n02/cliu/study/npp/out/zong/use/Untitled.ipynb
all_new/ipynb/ipynb_count/province_ccn-yrd-all.ipynb
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