condition mean min max ZT0-3 70.3915956725 53.18496607 87.598225275 ZT4-7 61.99311052 57.76581111 66.22040993 ZT8-11 23.094491367499998 17.725057205 28.46392553 ZT12-15 6.88108653375 4.036776039499999 9.725397028 ZT16-19 5.31188517575 3.790748506 6.8330218455 ZT20-23 8.572598418750001 7.2267781845000005 9.918418653