condition mean min max ZT0-3 1898.65 1898.65 1898.65 ZT4-7 2915.9 2915.9 2915.9 ZT8-11 2986.6499999999996 2986.6499999999996 2986.6499999999996 ZT12-15 3248.45 3248.45 3248.45 ZT16-19 3175.95 3175.95 3175.95 ZT20-23 2460.8500000000004 2460.8500000000004 2460.8500000000004