condition mean min max ZT0-3 109.722932 109.722932 109.722932 ZT4-7 130.308535 130.308535 130.308535 ZT8-11 142.431331 142.431331 142.431331 ZT12-15 103.329564 103.329564 103.329564 ZT16-19 157.4155895 157.4155895 157.4155895 ZT20-23 130.450222 130.450222 130.450222