condition mean min max ZT0-3 11.355350000000001 11.355350000000001 11.355350000000001 ZT4-7 8.476115 8.476115 8.476115 ZT8-11 6.523899999999999 6.523899999999999 6.523899999999999 ZT12-15 12.2776 12.2776 12.2776 ZT16-19 14.5602 14.5602 14.5602 ZT20-23 13.1354 13.1354 13.1354