condition mean min max ZT0-3 0.3629755 0.145982 0.579969 ZT4-7 0.7292814999999999 0.7292814999999999 0.7292814999999999 ZT8-11 0.734657 0.734657 0.734657 ZT12-15 0 0 0 ZT16-19 0.43125250000000004 0.43125250000000004 0.43125250000000004 ZT20-23 0.721295 0.721295 0.721295