condition mean min max ZT0-3 2.8106375000000003 2.664505 2.95677 ZT4-7 1.3007499999999999 1.3007499999999999 1.3007499999999999 ZT8-11 1.1023125 1.1023125 1.1023125 ZT12-15 0 0 0 ZT16-19 3.3236 3.3236 3.3236 ZT20-23 2.2471699999999997 2.2471699999999997 2.2471699999999997