median from histograms? Watch
anyone like to help?
plus, do we actually need to know this for gcse? i've only ever seen it in the textbook at school but not in any gcse revison guide/revision site
i guess it would be nice to know any how
so guys how is it done ?
Just add the frequency of the numbers together (not the actual number) and divide by 2 to find where the middle number should be. Alternatively, you could list the numbers and find the middle one
add them up then find the middle value then see what bar that is I suppose.
I have a question :
Time (m) Frequency FD CW
0<m<20 20 1 20
20<m<30 30 3 10
30<m<40 45 4.5 10
40<m<60 60 3 20
60<m<100 48 1.2 40
1) Work out an estimate for the median time : ................ minutes
CAN SOMEONE PLEASE HELP ME, AND SHOW ME HOW TO WORK IT OUT
Step by Step (The f column adds up to 203. If you divide that by 2 you get 101.5 ~ then you work out the class it is in ???)
THE ANSWER IS : 41 -43 minutes
I JUST NEED TO KNOW HOW TO WORK IT OUT ... my gcse is tomorrow :O
so Frequency = Frequency density X class width
Once you've found frequency...
Median = n/2 (where n is total frequency)
Once you've found median add up to frequencies until you've got up to your median and look at which class interval it lies in.
- Study Helper
Hello I was just wondering what happens if i have two medians (middle values) in my histogram ???please help! I have an assignment about it and am completely lostHelp needed ASAP if able Thanks a billion