Te Kete Ipurangi
Communities
Schools

### Te Kete Ipurangi user options:

Achievement objectives

What has changed:

# Statistical graphs

Statistical graphs play an important role in providing a picture of what the data show and enabling reasoning from data. Different graphs show different features of the data and in many instances multiple displays are used to capture the whole data story.

Generally data analysis at this level falls into three main categories:

### Summarising

The following graphs can be used for summarising data; these are situations where we want to summarise the key features of the data in question.

### Comparing

The following graphs can be used for comparing data; these are situations where we are looking at whether one group of values (measurements) tends to have bigger, taller, heavier, longer, wider values (measurements) than the other group.

### Inter-relating

The most useful graph for looking for features of a relationship in data is:

Times series data is another type of relationship, where the most useful graph for looking for features in data is:

## Contextual knowledge

The progression for contextual knowledge from level 6 to level 8 is as follows.

• At level 6 students should be working with contexts that are familiar to them.
• At level 7 students should be provided with relevant contextual knowledge about the situation under investigation.
• At level 8 students should be sourcing relevant contextual knowledge about the situation under investigation from places such as the internet, the school or local library, newspapers and magazines.

Last updated September 25, 2012