condition mean min max ZT0-3 21.923025000000003 20.50115 23.344900000000003 ZT4-7 9.767275 9.767275 9.767275 ZT8-11 4.853675 4.853675 4.853675 ZT12-15 0 0 0 ZT16-19 14.2137 14.2137 14.2137 ZT20-23 17.47065 17.47065 17.47065