【Python】python中p-value的实现

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案例:

  1. tt)
  2. print 't-statistic = %6.3f pvalue = %6.4f' % (tt,pval)
  3. t-statistic = 0.391 pvalue = 0.6955

链接

https://stackoverflow.com/questions/17559897/python-p-value-from-t-statistic

http://docs.scipy.org/doc/scipy/reference/tutorial/stats.html

可执行代码

  1. means = [0.0539,4,8,3,6,9,1]
  2. stds = [5,7,9]
  3. n = 20
  4. output = []
  5. for sm,std,m in zip(means,stds,mu):

  6. print("value:",sm,std)

  7. tt = (sm-m)/(std/np.sqrt(float(n)))      # t-statistic for mean
  8. pval = stats.t.sf(np.abs(tt),n-1)*2  # two-sided pvalue = Prob(abs(t)>tt)
  9. # print('t-statistic = %6.3f pvalue = %6.4f' % (tt,pval))
  10. output.append(format(pval))
  11. print("\t".join(output))


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