condition mean min max ZT0-3 1.3120675 1.201295 1.4228399999999999 ZT4-7 1.21616 1.21616 1.21616 ZT8-11 3.8622050000000003 3.8622050000000003 3.8622050000000003 ZT12-15 0 0 0 ZT16-19 4.2871049999999995 4.2871049999999995 4.2871049999999995 ZT20-23 2.947625 2.947625 2.947625