is it important to use 0, representing those
who said they did not work at all, in finding an average?
Thirty-six percent of US high
school seniors in the survey did not work at
all, while 21% of them worked more than 21 hours per week.
Is it possible for two very different sets of data to
have the same mean?
there are one or more unusually large numbers
with respect to the rest of the data in a data set, the
mean may be much larger than seems typical.
If there are one or more unusually small numbers in the
set with respect to the rest of the data, the mean may
be much smaller than seems typical.
Why is it reasonable to use
25 as an upper bound for the 21+ category in
the data of the challenge?