Adding Mentos mints to a caffeine diet soda container causes the beverage to spray out of its container, creating a huge soda geyser. A researcher claims that the average height of the geyser is 8.75. After sampling 50 bottles of the same caffeine diet soda with the Mentos mints, the average height of the geyser was determined to be 10.17 feet. What is the statistic of interest?
a) Mean
b) Median
c) Standard Deviation
d) Mode