condition mean min max ZT0-3 57.3281 54.6537 60.0025 ZT4-7 43.1558 43.1558 43.1558 ZT8-11 43.94685 43.94685 43.94685 ZT12-15 0 0 0 ZT16-19 72.78545 72.78545 72.78545 ZT20-23 57.2836 57.2836 57.2836