condition mean min max ZT0-3 2802.525923 2802.525923 2802.525923 ZT4-7 2494.2454195 2494.2454195 2494.2454195 ZT8-11 1667.6080200000001 1667.6080200000001 1667.6080200000001 ZT12-15 1216.459798 1216.459798 1216.459798 ZT16-19 1622.2497560000002 1622.2497560000002 1622.2497560000002 ZT20-23 2167.259574 2167.259574 2167.259574