median and quartiles of a grouped frequency

[red and white kop!]

when presented with a grouped frequency distribution, is there any other way to find the quartiles other than drawing up a cumulative frequency diagram?

 

[galactus]

See here:

http://www.mathsteacher.com.au/year9/ch ... rtiles.htm

 

[red and white kop!]

dude i know this, i mean grouped frequencies, like grouped

 

[Deleted member 4993]

dude i know this, i mean grouped frequencies, like grouped

In that case - you should have told us what your thoughts are about this question.