Originally Posted by

**knottwill** hello all,

please help as I'm very stuck!

I have 50 numbers.

I need to work out the interquartile range so i need the upper and lower quartiles.

which numbers do i use? all examples i find seen to be odd in total.

for the lower quartile i think I need the

50+1

-------- = 12.75th number

4

and for the upper quartile i think i need the

3(50+1)

----------- = 38.25th no.

4

how can i find this or am I going about this all wrong?

I dont understand how to get the 12.75th or 38.25th number.

Please help me! thanks a bunch. Will