I expect that the answer you are expected to give to this question isOriginally Posted bycrazy_gal108

that a bin width 0f 3 will give the data all falling within about 5 bins

which will be a bit to coarse to show whatever it is you expect the

histogram to show.

In the real world the number of bins you use depends on a number of factors.

The main one is "what do you want the histogram to show?" a second

important factor is "how many data points do you have?".

There are a number of formulas for the appropriate number of bins or bin

width to use for a histogram. Two of the most common are:

Scott's rule:

where h is the recommended bin width, and is an estimate

of the standard deviation of the data or underlying distribution, and

is the number of data points.

Freedman & Diaconis's rule:

where is the interquartile range of the data.

RonL