condition mean min max ZT0-3 1.4176505000000001 1.1751610000000001 1.66014 ZT4-7 2.910215 2.910215 2.910215 ZT8-11 5.18331 5.18331 5.18331 ZT12-15 0 0 0 ZT16-19 1.4176435 1.4176435 1.4176435 ZT20-23 1.658235 1.658235 1.658235