condition mean min max ZT0-3 194.7 194.7 194.7 ZT4-7 181.6 181.6 181.6 ZT8-11 204.6 204.6 204.6 ZT12-15 243.8 243.8 243.8 ZT16-19 225.75 225.75 225.75 ZT20-23 201.3 201.3 201.3