Corbettmaths - A video that shows you how to interpret cumulative frequency graphs. It shows you how to find the median, lower quartile, upper quartile and interquartile range, IQR.
O my God may God bless you. Thanks a lot tommoorow is my exam and I was not knowing ho to draw cummative frequency graph. It took for me to less than 4 minutes to understand. THANKS A LOT
i try to find soooo many videos just like this and so far this is the best well explained video I've watched and it has helped me sooo much thank you man
Tommorow got my math exam watched 2 of your vids recommended by the school and boy shoudl I say, your way of explination and over all east to understand is insane I bet even the teachers learn from you ha ha 🤣
Thank you for your brilliant video. Btw, I noticed that you used 80 divided by 2 to calculate the median in this video. I was wondering why you chose this method instead of using the GCSE formula, where the median is typically calculated using (n+1)/2. Could you explain the reasoning behind this choice? Thank you so much for your kind attention.
As cumulative frequency curves are drawn for grouped data (we don’t know the actual figures), any calculation of the median is only an estimate anyway. Therefore when finding the median from cumulative frequency curves, or histograms, or grouped data (linear interpolation), n/2 is usually used… feel free to go back through GCSE papers and their mark schemes and you’ll see n/2 is used. Finding the position of the median: add one or not? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5lvpL2g_wGY.html
Always found this difficult, in 2 years of my maths teacher trying to explain it to me, I've never fully understood it. From 5 minutes of watching a video il get full marks on cumulative frequency graph questions
