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
-------- = 12.75th number
and for the upper quartile i think i need the
----------- = 38.25th no.
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