condition mean min max ZT0-3 281.75 281.75 281.75 ZT4-7 193.3 193.3 193.3 ZT8-11 217.4 217.4 217.4 ZT12-15 283.95000000000005 283.95000000000005 283.95000000000005 ZT16-19 286.9 286.9 286.9 ZT20-23 283.6 283.6 283.6