GCSE Maths Median and IQR

How to find the median and inter-quartile range

Category:

Howto & Style

Tags:

• GCSE
• Maths
• Mathematics
• Median
• IQR

[iiRobyn]

Thank you! Just one question, what do you do if there is no middle number? Like if the middle two numbers are 7 and 8. Do you go half way between the two to get 7.5? Please please please reply :)

[bevets]

Yes! If the 'middle' numbers are 10 and 11 then add then and divide by 2. So the median will be 10.5

[lhamo95]

thank u so much but i have a real test coming up n i have 2 question why do u have to divided by 2 n at the last u said meadian is 2 and lower q is 1 and upper q is 7 then u said interquartile range is 7-1=6 so do u just forget about meadian number 2??

please reply back

[bevets]

The interquartilte range (IQR) = upper quartile - lower quartile.

Here 7-1 = 6.

When finding the IQR you don't need the median.

[twil05]

thanks my professor made this seem alot harder

[berkeley09]

i understood this in less than 3 minutes. my teacher made it seem much more complicated than it actually is.

good job.

[Hannified]

@kingpanda1 you have to add one, its just one of the rules, i was taught this too.

[Hannified]

wow aswell as being good at maths you can write upside down!!!

[onthetopofthetube]

thanks vm

[DrewGrg]

oh i used to srtuggle on this topic but after watching this video it enhanced my understanding. thannks

[miznblue]

thanks very much i need a recap

[candylandcookie]

THIS IS GREAT I UNDERSTOOD IT THE VERY FIRST TIME

[MrsShinyUnicorn]

This helps i have a mock exam tommorow and thats one less thing to revise on!!

[inam0001]

Thank you very much :D you helped me out for my year 9 End of year exam :D

[khalsaAK47]

since the sample size is 11, why did you add one to it to make it 12?

[AfghanGangsta2k9]

thanks you must have just helped me get a grade A* even thought that is grade C stuff lol