The Sand Canyon Archaeological Project edited by W. D. Lipe and published by Crow Canyon Archaeological Center contains the stem-and-leaf diagram shown in Figure 2-19. The study uses tree rings to accurately determine the year in which a tree was cut. The figure gives the treering- cutting dates for samples of timbers found in the architectural units at Sand Canyon Pueblo. The text referring to the figure says, €œThe three-digit numbers in the left column represent centuries and decades A.D. The numbers to the right represent individual years, with each number derived from an individual sample. Thus, 124|2 2 2 represents three samples dated to A.D. 1242.€ Use Figure 2-19 and the verbal description to answer the following questions.
(a) Which decade contained the most samples?
(b) How many samples had a tree-ring-cutting date between A.D. 1200 and A.D. 1239, inclusive?
(c) What are the dates of the longest interval during which no tree-cutting samples occurred? What might this indicate about new construction or renovation of the pueblo structures during this period?

The Sand Canyon Archaelogical Project, edited by W.D. Lipe, published by Crow Canyon Archaelogical Center.

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