condition mean min max ZT0-3 3814.6 3814.6 3814.6 ZT4-7 4078.0 4078.0 4078.0 ZT8-11 4184.1 4184.1 4184.1 ZT12-15 4753.3 4753.3 4753.3 ZT16-19 4050.2 4050.2 4050.2 ZT20-23 3843.2 3843.2 3843.2