Originally Posted by

**Espoir** Hello there,

Firstly, I'm not sure if this should be in Advanced or Basic, but I put it in basic because I don't think the question I'm asking is advanced.

I've been given a task and one of the question asks me to put the data into a Frequency Distribution table.

Basically, I can't get my head around what the classes should be.

There are 100 figures, going from 0-17. So the range is 17.

I am told that I need to group this data into **9 equal **classes, with **midpoints 1, 3, 5 etc.** This is just causing me a problem now, I can't figure out what the classes should be.

I tried:

0 - 2

3 - 4

5 - 6...

Until I realised the midpoints were not 1, 3, 5.

So now my latest assumption is that the classes are:

0 - 1.99

2 - 3.99

4 - 5.99...

This also finishes into 9 equal classes (16 - 17.99) however, if we add both of them up and divide them by 2 to get the midpoint, we realise the midpoint is 0.995.

**Could somebody please help me out? I must be missing something, I just don't understand how to go about it. I've tried several times, but this 1, 3, 5 midpoint is just blocking me now.**

Thank you in advance.