condition mean min max ZT0-3 4.91626085025 3.4807413725000003 6.351780327999999 ZT4-7 2.8823248662500003 2.7617939700000003 3.0028557625 ZT8-11 2.36577636325 1.9415571759999999 2.7899955505 ZT12-15 4.24127694375 3.2993810095 5.183172878000001 ZT16-19 5.78027564175 5.3079098605 6.252641423 ZT20-23 11.069845848749999 9.2055045825 12.934187115