condition mean min max ZT0-3 96.35 96.35 96.35 ZT4-7 189.4 189.4 189.4 ZT8-11 131.9 131.9 131.9 ZT12-15 123.19999999999999 123.19999999999999 123.19999999999999 ZT16-19 122.10000000000001 122.10000000000001 122.10000000000001 ZT20-23 96.80000000000001 96.80000000000001 96.80000000000001