Hello!

I was wondering how to properly set out the way of finding Q1, Q2 and Q3 from a cumulative frequency histogram. Is there a formula for each of them, as I know that finding Q2 when there is an odd number of results, its (n+1)/2 which is the one which is Q2, but for even numbers, it's more confusing. So can someone clarify on the formulas for finding Q1, Q2, and Q3, and if there are multiple methods, that would be appreciated

Thanks