condition mean min max ZT0-3 10.809773 10.809773 10.809773 ZT4-7 10.573201000000001 10.573201000000001 10.573201000000001 ZT8-11 11.918295 11.918295 11.918295 ZT12-15 10.10413 10.10413 10.10413 ZT16-19 10.4377655 10.4377655 10.4377655 ZT20-23 11.5298755 11.5298755 11.5298755