condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2174225 0.2174225 0.2174225 ZT12-15 0 0 0 ZT16-19 0.361172 0.361172 0.361172 ZT20-23 0.0727545 0.0727545 0.0727545