condition mean min max ZT0-3 4.24636 4.24636 4.24636 ZT4-7 1.2845849999999999 1.2845849999999999 1.2845849999999999 ZT8-11 4.256645000000001 4.256645000000001 4.256645000000001 ZT12-15 7.23477 7.23477 7.23477 ZT16-19 4.71523 4.71523 4.71523 ZT20-23 5.84825 5.84825 5.84825