condition mean min max ZT0-3 0.6768365000000001 0.6768365000000001 0.6768365000000001 ZT4-7 0.27379549999999997 0.27379549999999997 0.27379549999999997 ZT8-11 0.5083485 0.5083485 0.5083485 ZT12-15 0.890855 0.890855 0.890855 ZT16-19 2.505805 2.505805 2.505805 ZT20-23 0.9098235000000001 0.9098235000000001 0.9098235000000001