Fish Lengths (20 cm, 21, 24, 30, 32, 40)
Bin is (20, 30, 40, 50)

Here's how FREQUENCY works...

Based on your bins:

Count if <=20
Count if 20 but <=30
Count if 30 but <=40
Count if 40 but <=50
Count if 50

So, your results are correct for what the FREQUENCY function does. Now, if
you want to count based on some other interval evaluation, that's a
different story!

--
Biff
Microsoft Excel MVP


"Jake" wrote in message
...
The histogram analysis is automatically grouping fish lengths into the
next
larger bin-class (For example: 20 is considered part of the 20-bin; 21
and
24 are included in the 30 bin). From what I understand it is supposed to
group into the bin of equal or greater size, up to the next bin-class.

Ex. Fish Lengths (20 cm, 21, 24, 30, 32, 40)

Bin is (20, 30, 40, 50)

What it is doing: Frequencies (20 is 1; 30 is 3; 40 is 2, and 50 is 0)
What it should be doing: Freqs (20 is 3; 30 is 2; 40 is 1; and 50 is 0)

Please help!