condition mean min max ZT0-3 11.66165 10.249500000000001 13.02665 ZT4-7 11.3896 11.3896 11.3896 ZT8-11 7.961225 7.961225 7.961225 ZT12-15 16.187275 13.5278 18.84675 ZT16-19 15.301400000000001 15.301400000000001 15.301400000000001 ZT20-23 16.097 16.097 16.097