Focus Problem: Archaeology The Focus Problem at the beginning of the chapter refers to excavations at Burnt Mesa Pueblo in Bandelier National Monument. One question the archaeologists asked was: Is the raw material used by prehistoric Indians for stone tool manufacture independent of the archaeological excavation site? Two different excavation sites at Burnt Mesa Pueblo gave the information in the following table. Use a chi-square test with 5% level of signifi cance to test the claim that the raw material used for construction of stone tools and the excavation site are independent.

Stone Tool Construction Material, Burnt Mesa Pueblo Material Site A Site B Row Total Basalt 731 584 1315 Obsidian 102 93 195 Pedernal chert 510 525 1035 Other 85 94 179 Column Total 1428 1296 2724