Answer:
Mode and Median
Step-by-step explanation:
First of all, lets order the values in increasing order:
3 - 5 - 5 - 5 - 6 - 9
5 is the most common value, known as MODE.
But it also shows the half of the distribution., this is, what is the value that the divides the hall poorer and the half richer. Said in another way, 50% of the students earn $5 or less. This is call the MEDIAN.
5 can not be the mean, as the sum of all values is $33 so the mean is $33/6 = $5.5
