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jt.mcrae
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What is the median
 The midpoint of distribution where 50% of data is on either side
 located at (n+1_{/2}) position

What is the range
 The simplest measure for the spread of a distribution
 R= largest value smallest value

What is the inter quartile range (IQR)
 The spread of the middle 50% of data.
 IQR= Q3Q1
 Q1= midpoint of half below median
 Q2= median
 Q3= midpoint of half above median

What is included in a five number summary
 median
 Q1
 Q3
 minimum
 maximum
 (all shown in a box plot)

