# Scatter Plots – Age and Reaction Time - PowerPoint PPT Presentation

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Scatter Plots – Age and Reaction Time. By: Heather, Robyn & Ryan. http://www.youtube.com/watch?v=9Iw3a_LtJVE. Digital Resource 1. Declarative and procedural knowledge. Defining the Key terms. Why do we use scatter plots? Time for you to create a scatter plot.

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Scatter Plots – Age and Reaction Time

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## Scatter Plots – Age and Reaction Time

By: Heather, Robyn & Ryan

### Digital Resource 1

• Declarative and procedural knowledge.

• Defining the Key terms.

• Why do we use scatter plots?

• Time for you to create a scatter plot.

• Using a scatter plot to make predictions.

• Quick quiz

• Mathematical worth of additional three digital resources.

### Declarative & Procedural Knowledge

• Scatter Diagram – A graph of plotted points that show the relationship between two sets of data.

• Correlation – When the two sets of data are linked together; Co (meaning ‘together’), and Relation.

• You will also see the words, Relationship and association.

### Definitions

• Positive Correlation – When the values increase together.

• Negative Correlation – When one values decrease and the other increases.

• No Correlation - Where a change in one set of data has no effect on the other set.

### Definitions

• Line of best fit – To find the direction of a correlation between two variables.

• Trend line - A line on a graph indicating a statistical trend

### Definitions

• Bivariate data - a set up of data made up of two variables.

• For example, comparing height to weight or age to reaction time.

### Age vs. Braking reaction time(Stopping a car)

• Does the increase in temperature impact sunscreen sales? What do you think this scatter plot would look like?

### What Relationship is this?

• If the price of bananas increase does this effect the amount of bananas sold? What would this scatter plot relationship look like?

### What Relationship is this?

• If we plotted how old you are, and the results you got for your maths test, what correlation is there?

Thank you