condition mean min max ZT0-3 23.042866666666665 17.14615 29.70515 ZT4-7 24.28035 24.28035 24.28035 ZT8-11 25.48655 25.48655 25.48655 ZT12-15 22.576700000000002 21.93005 23.22335 ZT16-19 18.7236 18.7236 18.7236 ZT20-23 29.44435 29.44435 29.44435