Question
Tree-ring dates were used extensively in archaeological studies at Burnt Mesa Pueblo. At one site on the mesa, tree-ring dates (for many samples) gave a
Tree-ring dates were used extensively in archaeological studies at Burnt Mesa Pueblo. At one site on the mesa, tree-ring dates (for many samples) gave a mean date of1= year1269with standard deviation1=39years. At a second, removed site, the tree-ring dates gave a mean of2= year1104with standard deviation2=36years. Assume that both sites had dates that were approximately normally distributed. In the first area, an object was found and dated asx1= y
(a) Convert bothx1andx2tozvalues, and locate both of these values under the standard normal curve of the figure above. (Round your answers to two decimal places.)
z1= |
z2= |
(b) Which of these two items is the more unusual as an archaeological find in its location?
x1; the further azvalue is from zero, the more unusual it is.x2; the further azvalue is from zero, the more unusual it is.x1; the closer azvalue is to zero, the more unusual it is.x2; the closer azvalue is to zero, the more unusual it is.
ear1224. In the second area, another object was found and dated asx2= year1245.
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