 15 ecart_type_moyen=   3.04620624
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  367.067993  6738.75732  3.046206  16891.3691
  449.69101  2523.78491  3.046206  6326.11914
  454.834198  2048.68799  3.046206  5135.24121
  462.466858  3410.71704  3.046206  8549.30273
  468.985962  1304.06714  3.046206  3268.77466
  476.573944  1865.74072  3.046206  4676.66553
  500.861847  25139.1543  3.046206  63013.8008
  506.189209  9452.2666  3.046206  23693.0508
  511.183319  3227.26587  3.046206  8089.46436
  541.4776  1953.60278  3.046206  4896.90039
  584.060791  568.152161  3.046206  1424.13013
  679.576355  624.244873  3.046206  1564.73218
  700.509644  589.012268  3.046206  1476.41809
  704.308228  707.446411  3.046206  1773.28516
