Construct a grouped frequency distribution for the following 28 scores using a class width of 5.
23 20 18 22 12 14 21 23 16 21 22
21 16 18 27 30 17 24 21 27 19 29
25 23 28 24 19 18


OK here is where I am...
highest value 30
lowest value = 12
range of set 30-12= 18

but where do go from here?

The range is 30-12=18.

18/4=4.5

Which we round up to 5, which is the width.



12-16 4
17-21 11
22-26 8
27-31 5