condition mean min max ZT0-3 1.1850905 0.41099749999999996 1.9591835 ZT4-7 2.5057400000000003 2.5057400000000003 2.5057400000000003 ZT8-11 4.891095 4.891095 4.891095 ZT12-15 0 0 0 ZT16-19 5.65273 5.65273 5.65273 ZT20-23 2.339845 2.339845 2.339845