condition mean min max ZT0-3 348.316395 348.316395 348.316395 ZT4-7 329.4267265 329.4267265 329.4267265 ZT8-11 358.34840099999997 358.34840099999997 358.34840099999997 ZT12-15 380.676818 380.676818 380.676818 ZT16-19 411.1058395 411.1058395 411.1058395 ZT20-23 321.04225199999996 321.04225199999996 321.04225199999996