condition mean min max ZT0-3 128.239403 128.239403 128.239403 ZT4-7 137.303268 137.303268 137.303268 ZT8-11 145.9995835 145.9995835 145.9995835 ZT12-15 138.2893105 138.2893105 138.2893105 ZT16-19 155.675052 155.675052 155.675052 ZT20-23 174.05816099999998 174.05816099999998 174.05816099999998