condition mean min max ZT0-3 3866.5 3866.5 3866.5 ZT4-7 3574.6 3574.6 3574.6 ZT8-11 3345.2 3345.2 3345.2 ZT12-15 3654.45 3654.45 3654.45 ZT16-19 4039.75 4039.75 4039.75 ZT20-23 4149.1 4149.1 4149.1