condition mean min max ZT0-3 19.498195 19.498195 19.498195 ZT4-7 38.153684 38.153684 38.153684 ZT8-11 85.44178199999999 85.44178199999999 85.44178199999999 ZT12-15 119.949092 119.949092 119.949092 ZT16-19 98.68333799999999 98.68333799999999 98.68333799999999 ZT20-23 93.09089399999999 93.09089399999999 93.09089399999999