# Pose questions and collect categorical or numerical data by observation or survey (ACMSP118)

**LO: To collect categorical or numerical data by observation or survey.**

**Know:**

- How to conduct a survey
- How to answer questions to collect data
- The difference between categorical and numerical data

**Understand:**

- To understand that categorical and numerical data can be collected through various means

**Do:**

- I can collect categorical and numerical data

*Types of Data*

*Types of Data*

### There are **two different** types of data.

**Categorical data** is data that can be separated into **categories**.

For example, hair colour, favourite ice cream flavour, colour of cars, favourite subject in school is all categorical data.

**Numerical data** is data that can be taken in as **numbers.**

For example, how many siblings do you have, how many Apple devices do you have in your house, how tall are you are all numerical data.

### Numerical data is also **measurable**!

*How to Obtain Data*

*How to Obtain Data*

### Data can be obtained through **surveys** or **observation.**

**Surveys** involve asking questions from the people that you want information from.

### Survey questions could be, “what is your favourite colour?”, “how many hours did you spend watching tv last night?”

**Observation** involves just looking at the samples and drawing your own conclusions.

### Observations could be, “how many people in your class have dark hair?”, “how many boys are there in your class?”

### With observations, judgments are involved, which could alter the results depending on the person collecting the information.

**Numerical vs. Categorical Data Videos**

**Numerical vs. Categorical Data Videos**