condition mean min max ZT0-3 9.538025 9.538025 9.538025 ZT4-7 11.984994499999999 11.984994499999999 11.984994499999999 ZT8-11 10.195181 10.195181 10.195181 ZT12-15 10.97569 10.97569 10.97569 ZT16-19 11.534167 11.534167 11.534167 ZT20-23 11.354851499999999 11.354851499999999 11.354851499999999