condition mean min max ZT0-3 75.285 74.8306 75.7394 ZT4-7 80.1802 80.1802 80.1802 ZT8-11 60.02815 60.02815 60.02815 ZT12-15 0 0 0 ZT16-19 73.1275 73.1275 73.1275 ZT20-23 101.7124 101.7124 101.7124