condition mean min max ZT0-3 653.658704 653.658704 653.658704 ZT4-7 638.2808170000001 638.2808170000001 638.2808170000001 ZT8-11 571.3155535000001 571.3155535000001 571.3155535000001 ZT12-15 620.7669109999999 620.7669109999999 620.7669109999999 ZT16-19 661.5451599999999 661.5451599999999 661.5451599999999 ZT20-23 538.4200065 538.4200065 538.4200065