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Statistics (view source)

Revision as of 08:48, 28 August 2012

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=== What is the difference between a bar chart and a histogram? ===
 
=== What is the difference between a bar chart and a histogram? ===
 
   
 
   
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== Circle or Pie Chart ==
 
== Circle or Pie Chart ==
 
   
 
   
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[[Image:KOER-%20Mathematics%20-%20Statistics_html_461389d1.png]]These
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[[File:KOER-%20Mathematics%20-%20Statistics_html_461389d1.png]]These
 
are called circle graphs. A circle graph shows the relationship
 
are called circle graphs. A circle graph shows the relationship
 
between a whole and its parts. Here, the whole circle is divided into
 
between a whole and its parts. Here, the whole circle is divided into
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values in a data set and they have values x<sub>1</sub>, x<sub>2</sub>,
 
values in a data set and they have values x<sub>1</sub>, x<sub>2</sub>,
 
..., x<sub>n</sub>, then the sample mean, usually denoted by  
 
..., x<sub>n</sub>, then the sample mean, usually denoted by  
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(pronounced x bar), is:
 
(pronounced x bar), is:
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== Skewed Distributions and the Mean and Median ==
 
== Skewed Distributions and the Mean and Median ==
 
   
 
   
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often test whether our data is normally distributed as this is a
 
often test whether our data is normally distributed as this is a
 
common assumption underlying many statistical tests. An example of a
 
common assumption underlying many statistical tests. An example of a
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