condition mean min max ZT0-3 63.0279430225 58.077485615 67.97840043 ZT4-7 33.7122293925 32.473731560000004 34.950727224999994 ZT8-11 41.2360975025 36.142543724999996 46.32965128 ZT12-15 30.156820670000002 25.590962435 34.722678905 ZT16-19 38.82104878 30.460515565 47.181581995 ZT20-23 86.50542204499999 72.33069467 100.68014941999999