condition mean min max ZT0-3 1402.0 1402.0 1402.0 ZT4-7 883.4 883.4 883.4 ZT8-11 953.5999999999999 953.5999999999999 953.5999999999999 ZT12-15 940.4 940.4 940.4 ZT16-19 1123.0 1123.0 1123.0 ZT20-23 1309.75 1309.75 1309.75