condition mean min max ZT0-3 31.334049999999998 27.32445 35.34365 ZT4-7 34.02605 34.02605 34.02605 ZT8-11 103.74950000000001 103.74950000000001 103.74950000000001 ZT12-15 0 0 0 ZT16-19 101.84694999999999 101.84694999999999 101.84694999999999 ZT20-23 69.4816 69.4816 69.4816