condition mean min max ZT0-3 5.0154499999999995 5.0154499999999995 5.0154499999999995 ZT4-7 4.4845299999999995 4.4845299999999995 4.4845299999999995 ZT8-11 4.409415 4.409415 4.409415 ZT12-15 5.736205 5.736205 5.736205 ZT16-19 10.31423 10.31423 10.31423 ZT20-23 5.7492 5.7492 5.7492