How would you find out the median age from a age pyramid (you know the ones with male on one side and females on the other then a colomn of ages running up at the centre)
2007-08-15 00:04:18 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
all you got to do is take the numbers on the middle sort them out with their class centres and frequencies then find out the middle score, if its even set the get the two middle scores and divide it by 2.
2007-08-16 00:33:09 · answer #1 · answered by moe 1 · 0⤊ 0⤋
Since the median is the middle observation (or the average of the two middle observations if you have an even number), just count the number of observations you have in each row (X1, X2, ...), then count the number in total (X).
Then start adding X1+X2+...+Xk until it becomes greater than (X+1)/2 (if X is odd). Then your median will be the value of the k-th row.
If X is even, then add until you get more than X/2. If Xk = 1, then the median is (Xk + X(k-1))/2, else it's Xk.
2007-08-15 00:23:33 · answer #2 · answered by Anonymous · 0⤊ 0⤋
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2016-10-15 09:57:35 · answer #3 · answered by ? 4 · 0⤊ 0⤋
sort them in order
find the middle one.
If there are two middle element,
find the average of them
ex: 1,2,3,4,5
median=3
ex: 2,4,6,8
median=(4+6)/2=5
2007-08-15 00:20:34 · answer #4 · answered by iyiogrenci 6 · 0⤊ 0⤋