condition mean min max ZT0-3 834.8 834.8 834.8 ZT4-7 890.1 890.1 890.1 ZT8-11 794.3 794.3 794.3 ZT12-15 687.1 687.1 687.1 ZT16-19 757.9000000000001 757.9000000000001 757.9000000000001 ZT20-23 784.4000000000001 784.4000000000001 784.4000000000001