condition mean min max ZT0-3 88.61144999999999 82.3286 94.8943 ZT4-7 72.90115 72.90115 72.90115 ZT8-11 87.4291 87.4291 87.4291 ZT12-15 0 0 0 ZT16-19 80.70615000000001 80.70615000000001 80.70615000000001 ZT20-23 94.50635 94.50635 94.50635