condition mean min max ZT0-3 2276.25962 2276.25962 2276.25962 ZT4-7 2310.7016415 2310.7016415 2310.7016415 ZT8-11 2407.330924 2407.330924 2407.330924 ZT12-15 2491.4604535 2491.4604535 2491.4604535 ZT16-19 2408.4674365 2408.4674365 2408.4674365 ZT20-23 2888.9910225000003 2888.9910225000003 2888.9910225000003