condition mean min max ZT0-3 4.056925 4.0542 4.05965 ZT4-7 0.0 0.0 0.0 ZT8-11 4.13248 4.13248 4.13248 ZT12-15 0 0 0 ZT16-19 15.979899999999999 15.979899999999999 15.979899999999999 ZT20-23 3.99825 3.99825 3.99825