Mathematics 20
Hw #1
Measures of Central Tendency
1. Consider the data set 1, 2, 3, 4, 5, 6, 7, 8, 9.
a. Obtain the mean and median of the data
b. Replace the 9 in the data set by 99 and again compute the
mean and median. Decide which measure of center works bet-
ter here, and explain your answer.
c. For the data set in part (b), the mean is neither central nor
typical for the data. The lack of what property of the mean
accounts for this result?