Grouping in a graph

Help please

I would like to create a graph where the numbers are grouped in such a way as all numbers between 0 and -1 are shown in one column, all numbers between -1.1 and -2 are shown in the next column, all numbers between -2.1 and 3 are shown in another column etc

The numbers are shown below

11/03/09
-2.5
-3.8
-3.9
-4
-4.1
-4.5
-4.6
-4.9
-5.2
-5.4
-5.4
-5.5
-5.6
-5.6
-6.5
-6.7
-6.8
-6.9
-7.3
-7.8
-7.9
-7.9
-8.1
-8.3
-8.4
-8.7
-9
-9.1
-9.1
-9.1

I know it can be done in Minitab, but I would like to show it in Excel

I would also like the y axis to show 0 at the bottom and maximum number at the top please

If someone could help, I would be very grateful.

Thank you so much
Lynne

You need to summarize the data before charting it.

Either using formula or Pivot table.