condition mean min max ZT0-3 4.347569999999999 3.88173 4.813409999999999 ZT4-7 3.0119749999999996 3.0119749999999996 3.0119749999999996 ZT8-11 2.94665 2.94665 2.94665 ZT12-15 0 0 0 ZT16-19 3.69747 3.69747 3.69747 ZT20-23 3.22576 3.22576 3.22576