SOCR EduMaterials AnalysisActivities TwoPairedRank - Revision history

IvoDinov at 19:59, 23 January 2009

2009-01-23T19:59:24Z

Annie: /* Two Paired Sample Signed Rank Test Example */

2007-08-06T22:25:08Z

‎Two Paired Sample Signed Rank Test Example

Annie: /* Two Paired Sample Signed Rank Test Example */

2007-08-05T21:30:31Z

‎Two Paired Sample Signed Rank Test Example

Annie at 05:26, 5 August 2007

2007-08-05T05:26:39Z

New page

==Two Paired Sample Signed Rank Test Example==
We will demonstrate Two Paired Signed Rank Test (sometimes called Wilcoxon Signed Rank Test) with a SOCR built-in example. This example is based on a dataset from the statistical program "R." For more information of the R program, please see [http://cran.r-project.org/ CRAN Home Page]. The dataset used here is "shoes" under R's "MASS" library. In the dataset, ten boys are given to the wear of shoes of materials A and B for one foot. We'd like to find if one material is better than the other.

Here's the steps of the activity:

'''1.''' Click on '''Two Paired Sample Signed Rank Test''' at the left panel's combo box.
<center>[[Image:SOCR_AnalysisActivities_TwoPairedRank_Chu_051707_Fig1.gif|700px]]</center>

<center>[[Image:SOCR_AnalysisActivities_TwoPairedRank_Chu_051707_Fig1A.gif|450px]]</center>

On the right panel, first click on '''EXAMPLE 3''' and next click on "Data" to retreive the demonstrated example. This is the example we'll be looking at.Note that the data are difference of B - A.

<center>[[Image:SOCR_AnalysisActivities_TwoPairedRank_Chu_051707_Fig2.gif|700px]]</center>

'''2.''' Click on the "'''Mapping'''" button to get to the "'''Mapping'''" panel. Click on '''"ADD"''' under '''VARIABLE 1''' and to '''VARIABLE 2''' add the variables for Two Paired Sample Signed Rank Test. We care about the difference, so which on goes to '''VARIABLE 1''' is arbitrary. You can just add column '''A''' to '''VARIABLE 1''' and '''B''' to '''VARIABLE 2'''.
Here, the computer will set difference = Variable 2 - Variable 1. If you like the substraction to go the other way around, simple assign '''VARIABLE 1''' and '''VARIABLE 2''' in a different way.

<center>[[Image:SOCR_AnalysisActivities_TwoPairedRank_Chu_051707_Fig3.gif|700px]]</center>

'''3.''' Click on "'''Calculate'''" then "'''Result'''" to see the results.

<center>[[Image:SOCR_AnalysisActivities_TwoPairedRank_Chu_051707_Fig4.gif|700px]]</center>

'''Questions for students:''' By looking at the test results, what do you think about the data? What can you say about the two different shoe materials?

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-==Two Paired Sample Signed Rank Test Example==
+==[[SOCR_EduMaterials_AnalysesActivities | SOCR Analysis]] - Two Paired Sample Signed Rank Test Example==
 We will demonstrate Two Paired Signed Rank Test (sometimes called Wilcoxon Signed Rank Test) with a SOCR built-in example.  This example is based on a dataset from the statistical program "R." For more information of the R program, please see [http://cran.r-project.org/ CRAN Home Page]. The dataset used here is "shoes" under R's "MASS" library. In the dataset, ten boys are given to the wear of shoes of materials A and B for one foot. We'd like to find if one material is better than the other.
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-'''2.''' Click on the "'''Mapping'''" button to get to the "'''Mapping'''" panel. Click on '''"ADD"''' under '''VARIABLE 1''' to add '''A''' and click on '''ADD''' under '''VARIABLE 2''' to add '''B'''. We care about the difference, so which on goes to '''VARIABLE 1''' or '''VARIABLE 2''' is arbitrary. Here, the computer will set difference = Variable 2 - Variable 1. If you like the substraction to go the other way around, simple assign '''VARIABLE 1''' and '''VARIABLE 2''' in the opposite way.
+'''2.''' Click on the "'''Mapping'''" button to get to the "'''Mapping'''" panel. Click on '''"ADD"''' under '''VARIABLE 1''' to add '''A''' and click on '''ADD''' under '''VARIABLE 2''' to add '''B'''. We care about the difference, so which on goes to '''VARIABLE 1''' or '''VARIABLE 2''' is arbitrary. Here, the computer will set difference = Variable 2 - Variable 1. If you like the subtraction to go the other way around, simple assign '''VARIABLE 1''' and '''VARIABLE 2''' in the opposite way.
 <center>[[Image:SOCR_AnalysisActivities_TwoPairedRank_Chu_051707_Fig3.gif|700px]]</center>
 '''3.''' Click on "'''Calculate'''" then "'''Result'''" to see the results.
@@ Line 31: / Line 29: @@
 '''Questions for students:''' By looking at the test results, what do you think about the data? What can you say about the two different shoe materials?

← Older revision		Revision as of 22:25, 6 August 2007
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−	'''2.''' Click on the "'''Mapping'''" button to get to the "'''Mapping'''" panel. Click on '''"ADD"''' under '''VARIABLE 1''' ~~and~~ to '''~~VARIABLE 2~~''' ~~add the variables for Two Paired Sample Signed Rank Test. We care about the difference, so which~~ on ~~goes to~~ '''~~VARIABLE 1~~''' ~~is arbitrary. You can just add column~~ '''A''' to '''~~VARIABLE 1~~''' ~~and~~ '''B''' to '''VARIABLE 2'''.	+	'''2.''' Click on the "'''Mapping'''" button to get to the "'''Mapping'''" panel. Click on '''"ADD"''' under '''VARIABLE 1''' to add '''A''' and click on '''ADD''' under '''VARIABLE 2''' to add '''B'''. We care about the difference, so which on goes to '''VARIABLE 1''' or '''VARIABLE 2''' is arbitrary. Here, the computer will set difference = Variable 2 - Variable 1. If you like the substraction to go the other way around, simple assign '''VARIABLE 1''' and '''VARIABLE 2''' in the opposite way.
−	Here, the computer will set difference = Variable 2 - Variable 1. If you like the substraction to go the other way around, simple assign '''VARIABLE 1''' and '''VARIABLE 2''' in ~~a different~~ way.	+

← Older revision		Revision as of 21:30, 5 August 2007
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	'''Questions for students:''' By looking at the test results, what do you think about the data? What can you say about the two different shoe materials?		'''Questions for students:''' By looking at the test results, what do you think about the data? What can you say about the two different shoe materials?
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