Archaeologists gain insight into the social life of ancient tribes by measuring the distance (in centimeters) of each artifact found at a site from the €œcentral hearth€ (i.e., the middle of an artifact scatter). A graphical summary of these distances, in the form of a histogram, is called a ring diagram. (World Archaeology, Oct. 1997) Ring diagrams for two archaeological sites (A and G) in Europe are shown below and in the next column.
a. Identify the type of skewness (if any) present in the data collected at the two sites.
b. Archaeologists have associated unimodal ring diagrams with open-air hearths and multimodal ring diagrams with hearths inside dwellings. Can you identify the type of hearth (open air or inside dwelling) that was most likely present at each site?

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8 Site 40 80 120 160 200 240 280 320 36 400 440 480 520 Distance (cm) 18[ Site 16G 14 12 10 4 50 100 150 200 250 300 350 400 450 500 550 Distance (cm)