condition mean min max ZT0-3 11.546081666666666 8.153590000000001 17.18265 ZT4-7 15.688600000000001 15.688600000000001 15.688600000000001 ZT8-11 13.38645 13.38645 13.38645 ZT12-15 16.7125 16.15445 17.27055 ZT16-19 11.4967 11.4967 11.4967 ZT20-23 10.70316 10.70316 10.70316