The steps which Mr Thoreau can follow so he can compare these averages on his Excel file is:
This refers to the sum of numbers which are gotten from a list and divided by the numbers in the list and is the central value of the data.
With this in mind, we can see that because Mr Thoreau is making Excel to grade homework grades, then for him to find the average, he would select the data and then sort and filter them.
Read more about averages here:
https://brainly.com/question/6504879