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I am looking for a nice way to represent information on a given study for my classroom. I have two separate groups A and B and want to compare them (hoping that B is statistically significantly better than A). How can I program this? I am very new to this and not sure what to do! I think a box an whisker plot would look nice, but also want the p-value shown on the top comparing the two.
A 2.7
A 0.0
A 3.1
A 4.6
B 6.2
B 5.2
B 3.5
B 3.6
B 5.9
Any help is appreciated! Thank you
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The SAS code below takes your data set and reads the A and B into a variable called GROUP and the measures into a variable called VALUE. I then ran the TTEST procedure with plots=box. The output shows the p-values in a table and the boxplot below if that is okay. This is one of the easiest ways I could think of. The SAS output is contained in the attached pdf file. All the best - Randy
data work.compare;
length group $1;
input group value;
cards;
A 2.7
A 0.0
A 3.1
A 4.6
B 6.2
B 5.2
B 3.5
B 3.6
B 5.9
;
run;
ods graphics on;
proc ttest data=work.compare plots=box;
class group;
var value;
ods graphics off;
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You will need to run a test that creates p-values. Depending on the version of SAS you are using then you can add that value to a graph using an annotate dataset with your graph procedure.
Also, is that your actual data or do you have more records? Tests for a small sample is displayed are going to much different than for a larger sample. Also when compare (test) are you looking at means or distribution or something else?
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The SAS code below takes your data set and reads the A and B into a variable called GROUP and the measures into a variable called VALUE. I then ran the TTEST procedure with plots=box. The output shows the p-values in a table and the boxplot below if that is okay. This is one of the easiest ways I could think of. The SAS output is contained in the attached pdf file. All the best - Randy
data work.compare;
length group $1;
input group value;
cards;
A 2.7
A 0.0
A 3.1
A 4.6
B 6.2
B 5.2
B 3.5
B 3.6
B 5.9
;
run;
ods graphics on;
proc ttest data=work.compare plots=box;
class group;
var value;
ods graphics off;
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Is there anyway on the box-plot that I could include all the data points?
Both your answer (RandyCollica) and (stat@sas) answers are exactly what I needed!! Thank you
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Check proc boxplot that allows to put stats on the box plot. I don't think it will allow to put all data points.
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Hi,
This can provide the boxplot with p value added on it.
ods graphics on;
ods select boxplot;
proc anova data=have;
class group;
model value=group;
quit;
ods graphics off;