Summarising data
Investigating and comparing data distributions
General Mathematics: Units 1 and 2
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  Learning objectives
  Recap of past learning
  The mean
  Example: The mean
  The median
  The median: Odd number of data items
  The median: Even number of data items
  Finding the position of the median
  Example of finding the median
  Comparing the median and the mean
  The range
  Example of finding the range
  The interquartile range
  Example: The interquartile range
  Standard deviation
  What is the standard deviation: A detailed introduction
  Finding the standard deviation by hand
  Using the CAS to find the standard deviation

This is another video in the General Maths Units 1 and 2 course. This one looks at how we can use summary statistics to summarise data. I take a look the how to find the mean (and what that actually means). We look at finding the median for both odd and even numbers of data items. The range follows with a discussion about how this isn't a great measure of anything. I look at a comparison between the median and the mean and which is the best to use before heading into the excitement which is the Interquartile range. Finally I look at what the standard deviation is and how we find it using pencil and paper and CAS. There are a number of worked examples and all the theory is explained in my own unique style!
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vce maths maths tutorials summarising data find the mean find the median find the range find the interquartile range find the standard deviation summary statistics comparing median and mean Do I use the median or the mean general maths year 11 maths grade 11 maths unit 1 and 2 maths