condition mean min max ZT0-3 555.0999999999999 555.0999999999999 555.0999999999999 ZT4-7 569.7 569.7 569.7 ZT8-11 497.45 497.45 497.45 ZT12-15 442.9 442.9 442.9 ZT16-19 616.65 616.65 616.65 ZT20-23 726.4000000000001 726.4000000000001 726.4000000000001