condition mean min max ZT0-3 0.84323 0.0 1.68646 ZT4-7 0.0 0.0 0.0 ZT8-11 0.86898 0.86898 0.86898 ZT12-15 0 0 0 ZT16-19 1.6801249999999999 1.6801249999999999 1.6801249999999999 ZT20-23 2.529345 2.529345 2.529345