Statistical location Average

comparison of arithmetic mean, median , mode of 2 log-normal distributions different skewness.

the occurring number in list called mode. example, mode of list (1, 2, 2, 3, 3, 3, 4) 3. may happen there 2 or more numbers occur equally , more other number. in case there no agreed definition of mode. authors modes , there no mode.

median

the median middle number of group when ranked in order. (if there number of numbers, mean of middle 2 taken.)

thus find median, order list according elements magnitude , repeatedly remove pair consisting of highest , lowest values until either 1 or 2 values left. if 1 value left, median; if 2 values, median arithmetic mean of these two. method takes list 1, 7, 3, 13 , orders read 1, 3, 7, 13. 1 , 13 removed obtain list 3, 7. since there 2 elements in remaining list, median arithmetic mean, (3 + 7)/2 = 5.