By Brian S. Everitt
Because the first version of this booklet used to be released, S-PLUS has advanced markedly with new equipment of study, new graphical procedures, and a handy graphical consumer interface (GUI). at the present time, S-PLUS is the statistical software program of selection for plenty of utilized researchers in disciplines starting from finance to drugs. Combining the command line language and GUI of S-PLUS now makes this booklet much more appropriate for green clients, scholars, and a person with out the time, persistence, or history had to go through the numerous extra complicated manuals and texts out there.
The moment version of A instruction manual of Statistical Analyses utilizing S-Plus has been thoroughly revised to supply a very good creation to the most recent model of this robust software program approach. every one bankruptcy specializes in a selected statistical process, applies it to at least one or extra facts units, and exhibits how one can generate the proposed analyses and photographs utilizing S-PLUS. the writer explains S-PLUS services from either the Windows® and command-line views and obviously demonstrates the way to change among the 2.
This guide presents definitely the right automobile for introducing the fascinating probabilities S-PLUS, S-PLUS 2000, and S-PLUS 6 carry for facts research. the entire facts units utilized in the textual content, besides script documents giving the command language utilized in each one bankruptcy, can be found for obtain from the net at http://www.iop.kcl.ac.uk/iop/Departments/BioComp/splus.shtml
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Additional info for A Handbook of Statistical Analyses using S-Plus
0 (I v) z ?. 0. 7 Box plots for slimming data. 61). 2). Now we will use the aov function to fit various analysis of variance models to the data, beginning with models including only the main effect of Condition and then the main effects of both Condition and Status. summary(aov( Response-Condition,data=slim)) # the aov function requires a valid S-PLUS # formula and, if not already attached, # the name of a data frame. 9. Now rerun, taking Status first followed by Condition (we now assume that the slim data frame is attached).
2 Multiple Regression Model The multiple regression model has the general form where y, and x t l , xt2... xzpare, respectively, the values of a response variable and p explanatory variables for the ith observation in a sample of size n. The regression coeflcients, Po, P1 ... Pp are generally estimated by least squares - they represent the expected change in the response variable predicted by a unit change in the corresponding explanatory variables conditional on the values of the remaining explanatory variables.
4. 4 data. Scheffk multiple comparison results for levels of Poison in rat survival significantly less than for P1 and P2, which themselves do not differ in mean survival time. 5. It appears that the mean survival times for treatments A and B, A and D, and B and C differ. 8. To analyse this data set we shall use the command language approach. The unbalanced nature of the data can be seen by examining the cell counts in the design. 5 data. 5 Scheff6 multiple comparison results for Treatment levels in rat survival to give the following: Experimental Experienced Inexperienced To begin, 5 12 Control 11 6 it may b e helpful to examine some simple plots of the data.
A Handbook of Statistical Analyses using S-Plus by Brian S. Everitt