condition mean min max ZT0-3 14.03114 11.75143 16.310850000000002 ZT4-7 6.280405 6.280405 6.280405 ZT8-11 6.33006 6.33006 6.33006 ZT12-15 0 0 0 ZT16-19 10.175630000000002 10.175630000000002 10.175630000000002 ZT20-23 12.5023 12.5023 12.5023