SOCR EduMaterials AnalysisActivities TwoPairedT - Revision history

IvoDinov at 23:41, 9 August 2009

2009-08-09T23:41:23Z

IvoDinov at 23:38, 9 August 2009

2009-08-09T23:38:13Z

IvoDinov: entered new example from Nicolas Christou

2009-08-09T23:36:41Z

entered new example from Nicolas Christou

IvoDinov at 19:56, 23 January 2009

2009-01-23T19:56:00Z

Annie: /* Two Paired Sample T-Test Example */

2007-08-06T22:24:22Z

‎Two Paired Sample T-Test Example

Annie: /* Two Paired Sample T-Test Example */

2007-08-05T21:29:31Z

‎Two Paired Sample T-Test Example

Annie: /* Two Paired Sample T-Test Example */

2007-08-05T04:33:37Z

‎Two Paired Sample T-Test Example

Annie: /* Two Paired Sample T-Test Example */

2007-08-05T04:28:12Z

‎Two Paired Sample T-Test Example

Annie: /* Two Paired Sample T-Test Example */

2007-08-04T20:17:13Z

‎Two Paired Sample T-Test Example

Annie: /* Two Paired Sample T-Test Example */

2007-08-04T19:57:08Z

‎Two Paired Sample T-Test Example

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 * Test the null hypothesis that the means before and after are the same.  Use <math>\alpha=0.05</math>.
 <hr>
 {{translate|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=SOCR_EduMaterials_AnalysisActivities_TwoPairedT}}

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 {| class="wikitable"
 |-
-! Value at baseline || Value at the end   || Difference
+! || Value at baseline || Value at the end   || Difference
 |-
 | Subject 1  || <math>x_{1b}</math>  ||<math>x_{1a}</math>  || <math>d_1=x_{1b}-x_{1a}</math>
@@ Line 50: / Line 50: @@
 | Subject 3  || <math>x_{3b}</math>   ||<math>x_{3a}</math>  || <math>d_3=x_{3b}-x_{3a}</math>
 |-
-| ... || ...|| ...
+| ... || ...|| ... || ...
 |-
-| ... || ...|| ...
+| ... || ...|| ... || ...
 |-
 | Subject ''n'' || <math>x_{nb}</math> ||<math>x_{na}</math> || <math>d_n=x_{nb}-x_{na}</math>
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 |-
 | 28  || 43 || 15
-|}<center>
+|}</center>
 * Test the null hypothesis that the means before and after are the same.  Use <math>\alpha=0.05</math>.

@@ Line 3: / Line 3: @@
 This is a test for the hypothesis that two groups are with the same mean, while the data are actually paired. That is, Each value of group 1 has a corresponding value in group 2.
-==Two Paired Sample T-Test Example==
+===Two Paired Sample T-Test Example===
 Go to the [http://www.socr.ucla.edu/htmls/ana/TwoPairedSampleTTest_Analysis.html SOCR Two Paired Sample T-Test Applet]. We will demonstrate Two Paired T-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.
@@ Line 36: / Line 36: @@
 '''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?
 <hr>
 {{translate|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=SOCR_EduMaterials_AnalysisActivities_TwoPairedT}}

@@ Line 1: / Line 1: @@
 ==Two Paired Sample T-Test Example==
-==Two Paired Sample T-Test Example==
+Go to the [http://www.socr.ucla.edu/htmls/ana/TwoPairedSampleTTest_Analysis.html SOCR Two Paired Sample T-Test Applet]. We will demonstrate Two Paired T-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.
@@ Line 20: / Line 22: @@
-'''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.
@@ Line 33: / Line 35: @@
 '''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?

@@ Line 1: / Line 1: @@
 ==Two Paired Sample T-Test Example==
-We will demonstrate Two Paired T-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.
+This is a test for the hypothesis that two groups are with the same mean, while the data are actully paired. That is, Each value of group 1 has a corresponding value in group 2.
@@ Line 17: / Line 20: @@
-'''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 T-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.

← Older revision		Revision as of 21:29, 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?
		+
		+
		+
		+
		+	<hr>
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		+	{{translate\|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=SOCR_EduMaterials_AnalysisActivities_TwoPairedT}}

← Older revision		Revision as of 04:33, 5 August 2007
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	==Two Paired Sample T-Test Example==		==Two Paired Sample T-Test Example==
−	We will demonstrate Two Paired T-Test with ~~some~~ SOCR built-in ~~examples~~. This example is based on a dataset ~~taken~~ 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.	+	We will demonstrate Two Paired T-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.

← Older revision		Revision as of 04:28, 5 August 2007
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	==Two Paired Sample T-Test Example==		==Two Paired Sample T-Test Example==
−	We will demonstrate Two Paired T-Test with some SOCR built-in examples. This example is based on ~~the data~~ taken 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.	+	We will demonstrate Two Paired T-Test with some SOCR built-in examples. This example is based on a dataset taken 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.

← Older revision		Revision as of 20:17, 4 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 T-Test. 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''' and to '''VARIABLE 2''' add the variables for Two Paired Sample T-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.		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 19:57, 4 August 2007
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−	'''2.''' Click on the "'''Mapping'''" button to get to the "'''Mapping'''" panel. Click on '''"~~Add~~"''' under '''~~Dependent~~''' to add the ~~variable~~ for ~~One~~ Sample T-Test. Here, the ~~Column X~~ = B - A. ~~Don~~'~~t worry about C2 to C16 etc~~.	+	'''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 T-Test. 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.


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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?