condition mean min max ZT0-3 66.631435 66.631435 66.631435 ZT4-7 74.3784885 74.3784885 74.3784885 ZT8-11 80.661535 80.661535 80.661535 ZT12-15 94.55231649999999 94.55231649999999 94.55231649999999 ZT16-19 86.211154 86.211154 86.211154 ZT20-23 98.221387 98.221387 98.221387