condition mean min max ZT0-3 69.9 69.9 69.9 ZT4-7 51.2 51.2 51.2 ZT8-11 93.5 93.5 93.5 ZT12-15 64.55000000000001 64.55000000000001 64.55000000000001 ZT16-19 76.45 76.45 76.45 ZT20-23 56.8 56.8 56.8