condition mean min max ZT0-3 50.747228 50.747228 50.747228 ZT4-7 52.319663 52.319663 52.319663 ZT8-11 51.4535255 51.4535255 51.4535255 ZT12-15 53.0083725 53.0083725 53.0083725 ZT16-19 66.748051 66.748051 66.748051 ZT20-23 60.967200500000004 60.967200500000004 60.967200500000004