condition mean min max ZT0-3 0.9472105 0.7897495 1.1046715 ZT4-7 1.288775 1.288775 1.288775 ZT8-11 5.383325 5.383325 5.383325 ZT12-15 0 0 0 ZT16-19 4.945024999999999 4.945024999999999 4.945024999999999 ZT20-23 1.88842 1.88842 1.88842