condition mean min max ZT0-3 0.45680415850000006 0.188612058 0.7249962590000001 ZT4-7 1.20727568775 1.060777855 1.3537735204999999 ZT8-11 1.1998364725 1.181647583 1.2180253620000001 ZT12-15 4.09871524275 2.1731052245 6.024325261 ZT16-19 3.7957712257500003 3.444756899 4.1467855525 ZT20-23 5.5832088865 4.8430541455 6.3233636275