condition mean min max ZT0-3 0.2876498333333333 0.256306 0.3415475 ZT4-7 0.2995585 0.2995585 0.2995585 ZT8-11 0.657533 0.657533 0.657533 ZT12-15 0.86947775 0.7541135000000001 0.984842 ZT16-19 0.534018 0.534018 0.534018 ZT20-23 0.35979099999999997 0.35979099999999997 0.35979099999999997