condition mean min max ZT0-3 2.40920997575 1.861721001 2.9566989505000003 ZT4-7 17.83869529925 9.504281623499999 26.173108975 ZT8-11 91.5543517625 61.501656475 121.60704705 ZT12-15 128.6169868425 115.925989985 141.30798370000002 ZT16-19 53.963184062500005 44.56234091 63.364027215 ZT20-23 29.537031315 24.146166955 34.927895675