condition mean min max ZT0-3 1.95353 1.95353 1.95353 ZT4-7 1.4656099999999999 1.4656099999999999 1.4656099999999999 ZT8-11 0.8100054999999999 0.8100054999999999 0.8100054999999999 ZT12-15 1.79428 1.79428 1.79428 ZT16-19 1.975635 1.975635 1.975635 ZT20-23 1.92254 1.92254 1.92254