condition mean min max ZT0-3 32.355 30.9846 33.72539999999999 ZT4-7 41.919399999999996 41.919399999999996 41.919399999999996 ZT8-11 19.836100000000002 19.836100000000002 19.836100000000002 ZT12-15 0 0 0 ZT16-19 19.191499999999998 19.191499999999998 19.191499999999998 ZT20-23 24.0762 24.0762 24.0762