condition mean min max ZT0-3 62.53666666666667 53.67255 70.00435 ZT4-7 50.8056 50.8056 50.8056 ZT8-11 54.8821 54.8821 54.8821 ZT12-15 70.7168 70.23945 71.19415000000001 ZT16-19 66.6409 66.6409 66.6409 ZT20-23 78.99965 78.99965 78.99965