Quantitative Variables. Recall that quantitative variables have units, and are measured on a continuous scale… Examples: income (in $), height (in inches), website popularity (by number if hits). Quantitative Variables. Mathematical operations on quantitative variables makes sense …
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A bimodal histogram has two apparent peaks:
A histogram that doesn’t appear to have any mode and in which all the bars are approximately the same height is called uniform:
Do any unusual features stick out?
We will discuss these in more detail when we introduce box plots.
(n+1)/2 = (13+1)/2 = 7th position
2nd half: 3.6, 3.6, 3.7,3.8,3.9,3.9,6.4
The five-number summary of a distribution reports its median, quartiles, and extremes (maximum and minimum).
Example: The five-number summary for the ages at death for rock concert goers who died from being crushed is