condition mean min max ZT0-3 0.31779399999999997 0.127077 0.469417 ZT4-7 0.455973 0.455973 0.455973 ZT8-11 0.2337865 0.2337865 0.2337865 ZT12-15 0.24305375 0.2428835 0.243224 ZT16-19 0.773863 0.773863 0.773863 ZT20-23 0.6274774999999999 0.6274774999999999 0.6274774999999999