condition mean min max ZT0-3 0.022525233333333332 0.0 0.04751725 ZT4-7 0.01724345 0.01724345 0.01724345 ZT8-11 0.0 0.0 0.0 ZT12-15 0.010347025 0.0 0.02069405 ZT16-19 0.03566175 0.03566175 0.03566175 ZT20-23 0.05431745 0.05431745 0.05431745