condition mean min max ZT0-3 1014.1 1014.1 1014.1 ZT4-7 1053.4 1053.4 1053.4 ZT8-11 944.4000000000001 944.4000000000001 944.4000000000001 ZT12-15 810.35 810.35 810.35 ZT16-19 800.3 800.3 800.3 ZT20-23 858.1 858.1 858.1