condition mean min max ZT0-3 29.918928549999997 28.46992906 31.36792804 ZT4-7 30.47926079333333 29.06742171 31.891099876666665 ZT8-11 38.41801824 38.27008947 38.56594701 ZT12-15 39.032824965 36.27334910333333 41.79230082666667 ZT16-19 36.282235459999995 35.51182789333333 37.052643026666665 ZT20-23 25.43400372 22.28056956 28.58743788