Stats - Data Collection

Types of data

What is qualitative data?

qualitative-data-definition

Non-numerical values.

What is categorical data?

categorical-data-definition

Non-numerical values.

What’s an example of qualitative data?

qualitative-data-example

Colour.

What is quantitive data?

quantitative-data-definition

Numerical values.

What is discrete data?

discrete-data-definition

Data that can only have specific, numerical values.

What’s an example of discrete data?

discrete-data-example

Shoe size
Number of children

What is continious data?

continuous-data-definition

Data that can take any decimal value within a specified range.

What is continious qualititive data?

continuous-qualitative-nonexistent

That doesn’t exist.

Class interval terminology

In $20 \leq w < 70$, what does $20$ represent?

lower-class-boundary

The lower class boundary.

In $20 \leq w < 70$, what does $w$ represent?

class-interval-variable

The variable.

In $20 \leq w < 70$, what does $70$ represent?

upper-class-boundary

The upper class boundary.

What is $20 \leq w < 70$ in stats?

class-interval-definition

The class interval.

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

class-interval-midpoint

What is the class width of $20 \leq w < 70$?

class-width-calculation

$70 - 20 = 50$.

Choosing averages and describing data

What is the only type of average you can use for categorical data?

categorical-data-only-mode

Mode.

When a question asks “describe this type of data…” what sort of things should you be thinking?

describe-data-checklist

Qualitative/quantitative, discrete/continuous

Types of data

Class interval terminology

Choosing averages and describing data

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