condition mean min max ZT0-3 10.47237 10.47237 10.47237 ZT4-7 11.0779845 11.0779845 11.0779845 ZT8-11 12.6909435 12.6909435 12.6909435 ZT12-15 12.3456185 12.3456185 12.3456185 ZT16-19 13.674679000000001 13.674679000000001 13.674679000000001 ZT20-23 11.750029999999999 11.750029999999999 11.750029999999999