condition mean min max ZT0-3 256.098765 256.098765 256.098765 ZT4-7 382.5857165 382.5857165 382.5857165 ZT8-11 398.2908225 398.2908225 398.2908225 ZT12-15 319.608199 319.608199 319.608199 ZT16-19 342.6496725 342.6496725 342.6496725 ZT20-23 422.07387600000004 422.07387600000004 422.07387600000004