I have a list of average rainfall in inches, and I know the lowest value is 0.32 inches.
I am told the following: A frequency diagram of the data is required that uses groups of width
0.5 inches such that, for instance, all the recorded values from
0.5 inches up to but not including 1 inch are included in the same
group. The lowest rainfall is to be included in the first group.
Assuming that the rainfall was measured to the nearest one hundredth
of an inch, state the starting value of the first interval that you need
to use to obtain a frequency diagram with groups as described above.
My guess is 0.315, as when this is rounded to the nearest one hundredth it rounds up to 0.32, but I'm really not sure. And when I then construct a histogram with this starting value there's a gap between the y-axis and the first bar, which again I'm not sure is allowed. Can anyone help?