#statistics 

## Types
### Quantitative
**Histograms** - bar-type graphs for quantitative data

![[Pasted image 20230723180847.png]]
WIGGLY LINES IN THE BEGINNING - highlighting breaks in scale

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**Frequency polygon** - a line graph for quantitative data that also emphasizes the continuity of [[Variables in statistics|continuous]] variables
![[Pasted image 20230723181249.png]]
Points on the X-Axis on both sides - midpoints of the first unoccupied classes

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**Stem and Leaf Display** - a device for sorting quantitative [[Data in statistics|data]] on the basis of leading and trailing digits
![[Pasted image 20230723181440.png]]

### Qualitative
**Bar graph** - a bar-type graph for qualitative data. Gaps between adjacent bars emphasize the discrete nature of the data
![[Pasted image 20230723183420.png]]

## Shapes
![[Pasted image 20230723182825.png]]
A) [[Normal distribution]]
B) Bimodal suggests the coexistence of two different types of observations in the same distribution (e.g. the distribution of the ages of residents in a neighbourhood consisting largely of either new parents or their infants has a bimodal shape)

If the mean of a distribution is greater than its median, then the distribution is positively skewed. If otherwise, it's negatively skewed
![[Pasted image 20230827120900.png]]