Where and why do we plot points on cumulative frequency graphs?

At the end of each group. Say you have a table of groups and frequencies corresponding to those groups, for example for x we have group 0<x<=5 with frequency 6 and group 5<x<=15 with frequency 10. The cumulative frequency graph represents the total frequency below a certain value for x. Looking at the first group, all the 6 values for x could be 1. They could also be 2 ,3, 4 or 5 or even fractions. Or they could be mixed. The information given to us means that by the end of the group (when x=5), there are a total of 6 numbers. Therefore we plot the cumulative frequency at the highest value of the group. The point here is that cumulative graphs are an estimate because they are drawn with little information.

OO
Answered by Osman O. Maths tutor

4556 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

x = 0.436363636... (recurring). Prove algebraically that x can be written as 24/55.


Solve for x to 3dp: x^2 + 6x + 2 = 0


Expand (x+6)(x-3)


The equation of Line 1 is y= 3x-2, and the equation of Line 2 is 5= 9x- 3y. Are the two lines parallel?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences