condition mean min max ZT0-3 129.926579 129.926579 129.926579 ZT4-7 77.4735655 77.4735655 77.4735655 ZT8-11 58.2545225 58.2545225 58.2545225 ZT12-15 102.956986 102.956986 102.956986 ZT16-19 87.617129 87.617129 87.617129 ZT20-23 107.64810800000001 107.64810800000001 107.64810800000001