condition mean min max ZT0-3 2562.975 2332.87 2793.08 ZT4-7 641.684 641.684 641.684 ZT8-11 586.9225 586.9225 586.9225 ZT12-15 0 0 0 ZT16-19 2199.545 2199.545 2199.545 ZT20-23 2351.0699999999997 2351.0699999999997 2351.0699999999997