condition mean min max ZT0-3 24.813850000000002 23.1188 26.5089 ZT4-7 5.70934 5.70934 5.70934 ZT8-11 3.434955 3.434955 3.434955 ZT12-15 0 0 0 ZT16-19 9.075955 9.075955 9.075955 ZT20-23 11.693850000000001 11.693850000000001 11.693850000000001