condition mean min max ZT0-3 722.924364 722.924364 722.924364 ZT4-7 658.6663550000001 658.6663550000001 658.6663550000001 ZT8-11 608.0025410000001 608.0025410000001 608.0025410000001 ZT12-15 659.16491 659.16491 659.16491 ZT16-19 623.3920775 623.3920775 623.3920775 ZT20-23 686.2587120000001 686.2587120000001 686.2587120000001