condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0055288 0.0055288 0.0055288 ZT8-11 0.0 0.0 0.0 ZT12-15 0.01663115 0.01663115 0.01663115 ZT16-19 0.006973467126666666 0.006973467126666666 0.006973467126666666 ZT20-23 0.007363000000000001 0.007363000000000001 0.007363000000000001