Laserfiche WebLink
• In model A of the difference of the means test, tt,lt is <br />determined using equation 5. <br />(5) <br />where: <br />I _ XI aR <br />colt - <br />nls~ + nrr2 nl + nz <br />nl + nz - 2 nlnz <br />zl = release area mean crop production, <br />Xz = reference area mean crop production, <br />s,= = release area sample variance, <br />s,= = reference area sample variance, <br />nl = release area sample size, and <br />n~ = reference area sample size. <br />• The t~,bl~ value to be compared with t~ai~ will be selected <br />from a standard table of critical values for the Student's t- <br />distribution. The test will be one-tailed with a = 0.1 and degrees <br />of freedom = nl+n~-2. <br />In model B of the difference of the means test, t~,l~ is <br />determined using equation 6. <br />(6) <br />t - sl - sz <br />~- <br />z z <br />s, sz <br />nl-1 nz-1 <br />2.05-51(c) (Revised 04/15/9.4) <br />• <br />