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i~ <br />1 <br />'I~ <br />i <br />1 <br />1 <br />i <br />1 <br />1 <br />1 <br />1 <br />1 <br />i <br />1 <br />1 <br />1 <br />1 <br />1 <br />Table 7 <br />Chi-Square Analysis <br />Stone Ground <br />Circles Stone <br />0 E O E Total <br />Terrace 11 99 123 90 139 <br />Ridge 59 26 18 51 77 <br />Total 70 191 211 <br />Xz = 103.2419 (2), p < ,001 <br />Regression formulae for ground stone: <br />Estimated Frequency of Mano Fragments = 1.05 + (,3266 * Observed <br />Frequency of Metate Fragments); <br />Estimated Frequency of Metate Fragments = -1.69 + (2.50 <br />Observed Frequency of Mano Fragments) <br />r = .903, p < .001 <br />71 <br />