condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.3670215 0.3670215 0.3670215 ZT8-11 0.348676 0.348676 0.348676 ZT12-15 0.0764465 0.0756975 0.0771955 ZT16-19 0.06622795000000001 0.06622795000000001 0.06622795000000001 ZT20-23 0.0 0.0 0.0