Laserfiche WebLink
JoEllen Turner <br />R code: <br />(It is free statistical software, which can solve the problems that SAS can. I think i is better <br />to use R instead of SAS in this case, since you can download R and try the code by yourself. I <br />attach the two files "soil_first txt" and "soilsecond,txt" in the email, by which you can try <br />the follow ing R code,) <br />1. Code far the first data set: <br />Iibrary (MASS) <br />soil_ fist <- read,table( "soil_first.txt ") <br />narnes(soi_first)< -c( "soil ", "type') <br />sub<_so0_first$soil soi first type== "Substitutesoi "] <br />barxpGscl_firsttfsoil[soik firstStype= ="SoilBarxprofile "1 <br />library(MMASS) <br /># the Wilcoxon rank suns test between "Substitute Soil" and "Soil Barxerofile <br />wilcox.test(sub,barxp) <br />#Wileoxon rank sum test with continuity correction <br />#data: sub and barxp <br />#W = 55, p -value = 0.2036 <br />#alternative hypothesis: true location shift is not equal to 0 <br />lfConclusion: there is no significant difference between the distributions for "Substitute Soil" <br />and "Soil Baarxprofde" <br />d the Wilcoxon rank sum test between 'Substitute Sol" and "BerxLiftA" <br />barxa< -soil first$ sciljsoil _first$type= ='BarxLiftA"1 <br />w ilcox, test(s ub,barxa) <br /># Wilcoxon rank sum test with continuity correction <br />#data: sub and barxa <br />#W — 29.5, p -value 0.01641 #alternative hypothesis: true location shift is not equal to 0 <br />#Conclus ion: there is significant difference between the distributions for "Substitute Soil" <br />and " BarxLiftA" <br /># the Wilcoxon rank sum test between "Substitute Soil" and'BarxLiftB" <br />barxb<- sol_firstSsa[s oil_firstStypep-m"BarxLiftB1 <br />w ileox.test(sub,b arxb) <br />i#Vi ilcoxon rank sum test with continuity correction <br />#data: sub and barxb <br />#W = 25.5, p -value ° 0.7648 <br />#alternative hypothesis: true locztion shift is not equal to 0 <br />#Conclusion: there is no significant difference between the distributions for "Substitute Soil" <br />and " BarxLiftB" <br />2. Code for the second data set: <br />Iibrary(MASS) <br />970 -864 -7682 p.23 <br />PLTF 0024% <br />