condition mean min max ZT0-3 7.004625000000001 7.004625000000001 7.004625000000001 ZT4-7 5.48549 5.48549 5.48549 ZT8-11 5.77638 5.77638 5.77638 ZT12-15 7.54796 7.54796 7.54796 ZT16-19 7.743555 7.743555 7.743555 ZT20-23 7.419955 7.419955 7.419955