Outliers - an extreme value that does not fit the body of the data
Histogram - used to represent a continuous variable that has been summarised by a group frequency distribution. Frequency density = Frequency/Class width
Relative Frequency - A frequency expressed as a proportion of the total frequency
Box Plot - A diagram that shows the smallest value, Q1, median, Q3 and largest value
Skewness - Skewness is an indicator of the shape of distribution
- Symmetrical - Q2 - Q1 = Q3 - Q2
- Positive Skew - Q2 - Q1 < Q3 - Q2
- Negative Skew Q2 - Q1 > Q3 - Q2
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