condition mean min max ZT0-3 343.374797 343.374797 343.374797 ZT4-7 388.4578295 388.4578295 388.4578295 ZT8-11 334.629465 334.629465 334.629465 ZT12-15 376.2711445 376.2711445 376.2711445 ZT16-19 412.250853 412.250853 412.250853 ZT20-23 526.751571 526.751571 526.751571