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Table 2.04.10(2). Sandsae density --area to be mined <br />Date of sanplir.C: ;"1z 4 ,531 <br />Observer: Hvder and Houston <br />Attribate: Sandsa,-e density, Number cer 1/100th acre Data transformed <br />to 7T- for analysis, Twentv sanples taken or. Valent Sand and <br />fi"teen on Cs.;cod Sard--Data pooled <br />Samplesize (n) .............................................. <br />Mean M ....................... I ....................... <br />4.20 <br />(1-'..29 squared = 18.1=0 per plot, 1.540 per acre) <br />Su -n of squares (Sx2)........................................ 72.74 <br />Variance o` sar..Dle (sx2).............. I..................... 2.1L <br />Stnrd.=: -rvia:ion (,•<) 1.46 <br />(1.46 squared = 2.1.3 per plot, 213 per acre) <br />Stzndz d error (s c) ........................................ 0.25 <br />_. . _ <br />Coe:=is rent of variation CV ............................... 34% <br />Ccnfidence interval at go .: .................................. <br />(note: this is lc;, o; the mean) <br />Confidence interval at 90 :.................................. t 0.42 <br />(note: this is 10.: of the mean) <br />Confidence interval at 8Q, .................................. t 0.33 <br />(note: this is 8;:'o" the mean) <br />