condition mean min max ZT0-3 75.797757 75.797757 75.797757 ZT4-7 76.694922 76.694922 76.694922 ZT8-11 68.5116165 68.5116165 68.5116165 ZT12-15 83.679383 83.679383 83.679383 ZT16-19 97.880494 97.880494 97.880494 ZT20-23 108.80517350000001 108.80517350000001 108.80517350000001