condition mean min max ZT0-3 1.93087975 1.91506 1.9466995 ZT4-7 10.99024 10.99024 10.99024 ZT8-11 7.29608 7.29608 7.29608 ZT12-15 0 0 0 ZT16-19 5.4978750000000005 5.4978750000000005 5.4978750000000005 ZT20-23 4.802875 4.802875 4.802875