condition mean min max ZT0-3 58.8064223775 55.72660435 61.886240404999995 ZT4-7 46.098434145 41.46397492 50.73289337 ZT8-11 117.1336212775 86.183466905 148.08377565 ZT12-15 69.61411000999999 31.190360955 108.03785906499999 ZT16-19 19.1490959475 18.766415385000002 19.53177651 ZT20-23 14.9004937825 13.374728885 16.42625868