condition mean min max ZT0-3 1569.99263 1569.99263 1569.99263 ZT4-7 570.709794 570.709794 570.709794 ZT8-11 693.385707 693.385707 693.385707 ZT12-15 808.2965755 808.2965755 808.2965755 ZT16-19 1299.144851 1299.144851 1299.144851 ZT20-23 1859.0693979999999 1859.0693979999999 1859.0693979999999