# Stats - Data Collection

> Source: https://ollybritton.com/notes/a-level/maths/topics/stats/data-collection/ · Updated: 2020-09-29 · Tags: stats, year-1, school

##### What is qualatitive data??
Non-numerical values.

##### What is categorical dtaa??
Non-numerical values.

##### What's an example of qualititive data??
Colour.

##### What is quantitive data??
Numerical values.

##### What is discrete data??
Data that can only have specific, numerical values.

##### What's an example of discrete data??
* Shoe size
* Number of children

##### What is continious data??
Data that can take any decimal value within a specified range.

##### What is continious qualititive data??
That doesn't exist.

##### In $20 \leq w < 70$, what does $20$ represent??
The lower class boundary.

##### In $20 \leq w < 70$, what does $w$ represent??
The variable.

##### In $20 \leq w < 70$, what does $70$ represent??
THe upper class boundary.

##### What is $20 \leq w < 70$ in stats??
The class interval.

##### What is the midpoint of $20 \leq w < 70$??
45.

##### What is the class width of $20 \leq w < 70$??
$70 - 20 = 50$.

### 2022-05-04
##### What is the only type of average you can you for categorical data??
Mode.

##### When a question asks "describe this type of data..." what sort of things should you be thinking??
Qualitative/quantitative, discrete/continuous

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