condition mean min max ZT0-3 0.040597175 0.0400867 0.04110765 ZT4-7 0.0554042 0.0554042 0.0554042 ZT8-11 0.206506 0.206506 0.206506 ZT12-15 0 0 0 ZT16-19 0.12106229999999998 0.12106229999999998 0.12106229999999998 ZT20-23 0.28425900000000004 0.28425900000000004 0.28425900000000004