condition mean min max ZT0-3 10.647567500000001 10.440035 10.8551 ZT4-7 35.46395 35.46395 35.46395 ZT8-11 29.984099999999998 29.984099999999998 29.984099999999998 ZT12-15 0 0 0 ZT16-19 10.232195 10.232195 10.232195 ZT20-23 15.0168 15.0168 15.0168