@Katsugeki TOUKEN RANBU Protect Histo- Homework #7 (Chapter 4, Section 4) - A. 65 Syllabus - Spring 2022-Elementary Stati_ G Sign in - Google Accounts A Syllabus for AMAT 108 (1762) 7. [-/1.11 Points] DETAILS MY NOTES ASK YOUR TEACHER 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 of #, = year 1280 with standard deviation G, = 37 years. At a second, removed site, the tree-ring dates gave a mean of #2 = year 1104 with standard deviation oz = 35 years. Assume that both sites had dates that were approximately normally distributed. In the first area, an object was found and dated as x, = year 1205. In the second area, another object was found and dated as X2 = year 1248. The Standard Normal Distribution (1 = 0,0 = 1) -1 0 68% of area 95% of area 99.7% of area (a) Convert both x, and x, to z values, and locate both of these values under the standard normal curve of the figure above. (Round your answers to two decimal places.) 21 = 2, = (b) Which of these two items is the more unusual as an archaeological find in its location? x, ; the further a z value is from zero, the more unusual it is. x2; the further a z value is from zero, the more unusual it is. x); the closer a z value is to zero, the more unusual It is. (x2; the closer a z value is to zero, the more unusual it is