Question

Consider this sample of rainfall, in inches, in Seattle from 2002 to 2017 (real data). If you were making a histogram of this data, what would you set the bin width to and why?

Answer 1

Here, we have 18 years i.e from 2002 to 2017. While making histograms, we need to define bins, defining the right bins helps in understanding the histogram in a better way.

Here, the bin size can be 4 i.e from 2002 to 2005, 2006 to 2009, and so on.

Selecting 4 as the bin size makes it more clear to understand and less messy.

It will look something like this -

Years	frequency
2002 to 2005
2006 to 2009
2010 to 2013
2014 to 2017
2018 to 2021