Shaft graves in ancient Greece. Refer to the American Journal of Archaeology (Jan. 2014) study of sword shaft graves in ancient Greece, Exercise 2.37 (p. 78). The number of sword shafts buried at each of 13 recently discovered grave sites is reproduced in the following table.

1 2 3 1 5 6 2 4 1 2 4 2 9 Source: Harrell, K. “The fallen and their swords: A new explanation for the rise of the shaft graves.” American Journal of Archaeology, Vol. 118, No. 1, January 2014 (Figure 1).

a. Calculate the mean of the data. Interpret the result.

b. Calculate the median of the data. Interpret the result.

c. Find the mode of the data. Interpret the result.