condition mean min max ZT0-3 1217.1 1217.1 1217.1 ZT4-7 1052.0 1052.0 1052.0 ZT8-11 990.95 990.95 990.95 ZT12-15 1115.5 1115.5 1115.5 ZT16-19 1318.5 1318.5 1318.5 ZT20-23 1210.75 1210.75 1210.75