"The range is the difference between the largest number and the smallest
number in the set." Source: Onwubiko page 176.
The following statements are from range:
"If na.rm is FALSE, NA and NaN values in any of the
arguments will cause NA values to be returned, otherwise NA
values are ignored."
"If finite is TRUE, the minimum and maximum of all finite values is
computed, i.e., finite = TRUE includes na.rm = TRUE."