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Statistics (view source)

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== Textbook ==
 
== Textbook ==
 
Please click here for Karnataka and other text books.
 
Please click here for Karnataka and other text books.
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# Karnataka text book for Class 10, Chapter 06 - Statistics
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===NCERT Books===
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# NCERT text book for class 10, Chapter 14 - Statistics  
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*[http://ncert.nic.in/NCERTS/textbook/textbook.htm?jemh1=14-14 Class 10 Statistics]
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# Page No 279-298 of Temilnadu text book for class 10 - Statistics  
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*[http://ncert.nic.in/NCERTS/textbook/textbook.htm?iemh1=14-15 Class 9 Statistics]
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*[http://www.ncert.nic.in/ncerts/textbook/textbook.htm?hemh1=5-16 Data Handling Class 8]
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===Tamilnadu Books===
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*[http://www.textbooksonline.tn.nic.in/Books/Std09/Std09-II-Maths-EM.pdf Class 9 Statistics]
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*[http://www.textbooksonline.tn.nic.in/Books/Std10/Std10-Maths-EM-2.pdf Class 10 Statistics]
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== Additional Information ==
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=== Resources ===
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== Additional Information ==
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==== Resource Title ====
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[http://www.learnalberta.ca/content/mejhm/index.html?l=0&ID1=AB.MATH.JR.STAT Statistics and Probability]
    
=== Useful websites ===
 
=== Useful websites ===
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It is useful to refer  http://en.wikipedia.org/wiki/Statistics
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STATISTICS IS FUN.
 
STATISTICS IS FUN.
 
# This website  has many powerful videos based on statistical inferences on important social issues [http://gapminder.org/videos/the-joy-of-stats/#.U8JbOzf_QjA click here]  
 
# This website  has many powerful videos based on statistical inferences on important social issues [http://gapminder.org/videos/the-joy-of-stats/#.U8JbOzf_QjA click here]  
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=== Activities ===
 
=== Activities ===
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# Activity No #1 '''Concept Name - Activity No.'''
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# Activity No #1 '''[[Representing data- Activity 1|Representing Data - Activity No1]].'''
 
# Activity No #2 '''Concept Name - Activity No.'''<br>
 
# Activity No #2 '''Concept Name - Activity No.'''<br>
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entertainment value, , then this could give the wrong impression that
 
entertainment value, , then this could give the wrong impression that
 
TV was being used as an educational tool in your home .
 
TV was being used as an educational tool in your home .
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==Concept 3: Collection, Organising and Grouping the data.==
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===Learning objectives===
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#Organising and Grouping the collected data systematically
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===Notes for teachers===
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===Activity No#===
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A group of students were asked to say which animal they would like most to have as a pet. The results are given below: dog, cat, cat, fish, cat, rabbit, dog, cat, rabbit, dog, cat, dog, dog, dog, cat, cow, fish, rabbit, dog, cat, dog, cat, cat, dog, rabbit, cat, fish, dog. Make a frequency distribution table for the same.
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{| style="height:10px; float:right; align:center;"
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|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">''[http://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
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|}
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*Estimated Time 30 min.
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*Materials/ Resources needed chart, marker.
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*Prerequisites/Instructions, if any
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*Multimedia resources
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*Website interactives/ links/ / Geogebra Applets
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*Process/ Developmental Questions
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*Evaluation
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*Question Corner
 
== Data Collection ==
 
== Data Collection ==
 
   
 
   
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Rajan made it simpler
 
Rajan made it simpler
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=== Meaning of Frequency ===
 
=== Meaning of Frequency ===
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nominal data sets.
 
nominal data sets.
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== Circle or Pie Chart ==
 
== Circle or Pie Chart ==
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A&gt; In the past year, you have recorded the
 
A&gt; In the past year, you have recorded the
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Imagine that a tutor asks 100 students to complete
 
Imagine that a tutor asks 100 students to complete
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Dependent Variable: Test Mark (measured from 0 to
 
Dependent Variable: Test Mark (measured from 0 to
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Independent Variables: Revision time (measured in
 
Independent Variables: Revision time (measured in
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The dependent variable is simply that, a variable
 
The dependent variable is simply that, a variable
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Therefore, the aim of the tutor's investigation is
 
Therefore, the aim of the tutor's investigation is
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In the section on experimental and
 
In the section on experimental and
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=== Categorical and Continuous Variables ===
 
=== Categorical and Continuous Variables ===
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'''Nominal variables''' are variables that have
 
'''Nominal variables''' are variables that have
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'''When not to use the mean'''
 
'''When not to use the mean'''
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== Summary of when to use the mean, median and mode ==
 
== Summary of when to use the mean, median and mode ==
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A. 27 members of a
 
A. 27 members of a
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Range = maximum value - minimum value
 
Range = maximum value - minimum value
    
   
 
   
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For example, let us consider the following data
 
For example, let us consider the following data
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The maximum value is 85 and the minimum value is
 
The maximum value is 85 and the minimum value is
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Order Score Order Score Order Score Order
 
Order Score Order Score Order Score Order
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20th 42 40th 52 60th 64 80th 74 100th 85
 
20th 42 40th 52 60th 64 80th 74 100th 85
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The first quartile (Q1) lies between the 25th and
 
The first quartile (Q1) lies between the 25th and
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First quartile (Q1) = 45 + 45 ÷ 2 = 45
 
First quartile (Q1) = 45 + 45 ÷ 2 = 45
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In the above example, we have an even number of
 
In the above example, we have an even number of
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Quartiles are a useful measure of spread because
 
Quartiles are a useful measure of spread because
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Interquartile range = Q3 - Q1
 
Interquartile range = Q3 - Q1
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However, it should be noted that in journals and
 
However, it should be noted that in journals and
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A slight variation on this is the
 
A slight variation on this is the
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The absolute and mean absolute deviation show the
 
The absolute and mean absolute deviation show the
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=== Absolute Deviation and Mean Absolute Deviation ===
 
=== Absolute Deviation and Mean Absolute Deviation ===
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To find out the total variability in our data set,
 
To find out the total variability in our data set,
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=== Variance ===
 
=== Variance ===
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As a measure of variability, the variance is
 
As a measure of variability, the variance is
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[[Image:KOER-%20Mathematics%20-%20Statistics_html_1afc44b3.png]]
 
[[Image:KOER-%20Mathematics%20-%20Statistics_html_1afc44b3.png]]
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where v is the standard
 
where v is the standard
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