condition mean min max ZT0-3 99.577725 93.30205000000001 105.8534 ZT4-7 66.41655 66.41655 66.41655 ZT8-11 11.17465 11.17465 11.17465 ZT12-15 0 0 0 ZT16-19 49.27285 49.27285 49.27285 ZT20-23 93.53195 93.53195 93.53195