condition mean min max ZT0-3 62.579166666666666 47.056200000000004 82.47595 ZT4-7 39.348349999999996 39.348349999999996 39.348349999999996 ZT8-11 42.21785 42.21785 42.21785 ZT12-15 106.0041 92.6632 119.345 ZT16-19 102.9188 102.9188 102.9188 ZT20-23 104.0008 104.0008 104.0008