condition mean min max ZT0-3 5.6386 5.6386 5.6386 ZT4-7 4.37923 4.37923 4.37923 ZT8-11 4.174065 4.174065 4.174065 ZT12-15 4.91399 4.91399 4.91399 ZT16-19 5.750045 5.750045 5.750045 ZT20-23 5.339885000000001 5.339885000000001 5.339885000000001