condition mean min max ZT0-3 45.5777419375 19.19051568 71.964968195 ZT4-7 135.16595990000002 132.860802 137.4711178 ZT8-11 76.174540875 62.09770375000001 90.251378 ZT12-15 12.1064501605 6.453860625999999 17.759039695 ZT16-19 8.57439178325 7.843646152 9.305137414499999 ZT20-23 5.910475903250001 4.642638119 7.178313687500001