Difference between revisions of "SOCR EduMaterials AnalysisActivities Proportion Test"

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(SOCR Analyses Example on the Proportion Test)
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This example is from UCLA STAT 13 "Introduction to Statistical Methods for the Life and Health Sciences" Lecture Notes by Ivo Dinov.
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This example is from UCLA STAT 13 "Introduction to Statistical Methods for the Life and Health Sciences" [http://www.stat.ucla.edu/%7Edinov/courses_students.dir/06/Fall/STAT13.1.dir/STAT13_notes.dir/lecture06.pdf/Lecture Notes] by Ivo Dinov. (Slide 23) The data are about a studying the effect of aspirin in reducing heart attacks. The data consist of 500 subjects with 17 of them having heart, marked as 1,  and the rest marked as 0.
 
    
 
    
 
'''Steps:'''
 
'''Steps:'''
  
'''1.''' The data of this example has 4 groups: A, B, C and D. Click on "'''Two Independent Kruskal-Wallis Test'''" from the conbo box in the left panel.
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'''1.''' Click on "'''Two Independent Kruskal-Wallis Test'''" from the conbo box in the left panel.
  
  
 
<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig1.gif|700px]]</center>
 
<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig1.gif|700px]]</center>
 
 
<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig1A.gif|450px]]</center>
 
  
  
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<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig2.gif|700px]]</center>
 
<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig2.gif|700px]]</center>
  
'''3.''' The data need to be send to the computer for analysis. In the Kruskal-Wallis test, at least two groups need to be included. You can certainly include any two groups, any three groups, or all the avaialble groups, etc., from the data set. The test will only analyze the groups selected. Therefore, you'll need to let the computer know what groups you're choosing. This is done in the "Mapping" panel. Click on the "Mapping" button to include the groups you want.
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'''3.''' The data need to be send to the computer for analysis. Click on the "Mapping" button to include the groups you want.
  
 
<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig2A.gif|700px]]</center>
 
<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig2A.gif|700px]]</center>
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'''4.''' Click on the "Input" button to select significance level. Default is 0.05.
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<center>[[Image:SOCR_AnalysisActivities_Proportion_Chu_061407_Fig2B.gif|700px]]</center>
  
  
'''4.''' Next, click on the "'''Calculate'''" button. Now you're ready to see the results. Just click on the "Result" button.  
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'''5.''' Next, click on the "'''Calculate'''" button. Now you're ready to see the results. Just click on the "Result" button.  
  
  

Revision as of 03:58, 25 August 2007

Proportional Test Background

SOCR Analyses Example on the Proportion Test

This example is from UCLA STAT 13 "Introduction to Statistical Methods for the Life and Health Sciences" Notes by Ivo Dinov. (Slide 23) The data are about a studying the effect of aspirin in reducing heart attacks. The data consist of 500 subjects with 17 of them having heart, marked as 1, and the rest marked as 0.

Steps:

1. Click on "Two Independent Kruskal-Wallis Test" from the conbo box in the left panel.


SOCR AnalysisActivities Proportion Chu 061407 Fig1.gif


2. Click on "Example 2" button. than the "Data" button to see the data.

SOCR AnalysisActivities Proportion Chu 061407 Fig2.gif

3. The data need to be send to the computer for analysis. Click on the "Mapping" button to include the groups you want.

SOCR AnalysisActivities Proportion Chu 061407 Fig2A.gif

4. Click on the "Input" button to select significance level. Default is 0.05.

SOCR AnalysisActivities Proportion Chu 061407 Fig2B.gif


5. Next, click on the "Calculate" button. Now you're ready to see the results. Just click on the "Result" button.


SOCR AnalysisActivities Proportion Chu 061407 Fig3.gif

Scroll down to see complete results.


If you'd like to include some other group(s) or remove the current groups and start over, simply go to the Mapping button and take the groups you want.


Note: if you happen to click on the "Clear" button in the middle of the procedure, all the data will be cleared out. Simply start over from step 1 and reteive the data by click an EXAMPLE button.





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