condition mean min max ZT0-3 5.6886849999999995 4.56598 6.811389999999999 ZT4-7 11.514555000000001 11.514555000000001 11.514555000000001 ZT8-11 10.395565 10.395565 10.395565 ZT12-15 0 0 0 ZT16-19 10.7745 10.7745 10.7745 ZT20-23 8.44533 8.44533 8.44533