Dimes Minted in the United States Average 2

Essay

Dimes minted in the United States average 2.286 g with a standard deviation of 0.06 g.
Nickels have a mean of 5.000 g and a standard deviation of about 0.08 g. A couple
chemistry students were trying out their teacher's new scale by weighing a bunch of coins.
They found a nickel that weighed 5.19 g and a dime that weighed 2.45 g. Which coin was
more exceptionally heavy? Explain.