Taw qhia txog xam xaj
Arithmetic mean (arithmetic mean), kuj hu ua mean, yog qhov yooj yim tshaj plaws thiab siv qhov nruab nrab hauv nruab nrab txheeb cais. Nws tau muab faib ua cov lej yooj yim hauv nruab nrab thiab txhais tau tias hnyav npaum li cas. Nws yog tsuas yog tsim nyog rau cov zauv suav, tsis yog rau cov ntaub ntawv zoo. Raws li cov qauv sib txawv ntawm qhov hais tawm, cov lej xam muaj cov qauv sib txawv thiab cov qauv sib piv.