condition mean min max ZT0-3 51.69383333333333 51.69383333333333 51.69383333333333 ZT4-7 41.07855 41.07855 41.07855 ZT8-11 37.78385 37.78385 37.78385 ZT12-15 47.248599999999996 47.248599999999996 47.248599999999996 ZT16-19 60.098600000000005 60.098600000000005 60.098600000000005 ZT20-23 52.3284 52.3284 52.3284