condition mean min max ZT0-3 23.92745 23.92745 23.92745 ZT4-7 23.7379 23.7379 23.7379 ZT8-11 8.553650000000001 8.553650000000001 8.553650000000001 ZT12-15 4.719035 4.719035 4.719035 ZT16-19 11.60747 11.60747 11.60747 ZT20-23 10.815065 10.815065 10.815065