condition mean min max ZT0-3 10.94227 10.94227 10.94227 ZT4-7 11.2840095 11.2840095 11.2840095 ZT8-11 10.066512 10.066512 10.066512 ZT12-15 9.77406 9.77406 9.77406 ZT16-19 11.1937495 11.1937495 11.1937495 ZT20-23 10.531067 10.531067 10.531067