Scatter

Diagrams

Summer Cadre 2006

What is a Scatter Diagram?

• A Scatter Diagram is used to confirm a relationship between two variables.

• A Scatter Diagram is also used to test for possible cause and effect.

Gathering Data

• Gather your data for the two variables you are going to compare. For example, print your students’ attendance records and FCAT levels.

Enter Data in a Spreadsheet

• Open a new worksheet in Excel

• Enter your data

Making the Scatter Diagram

• Highlight the data

‘To highlight, Click cell B2 and then

hold the left mouse button down

as you drag the cursor down

to last cell’

B2

Last Cell

Open the Chart Wizard

• Click the Chart Wizard

Step 1 of the Chart Wizard

• Click the type ‘XY (Scatter)’

• Click ‘Next’

Step 2 of the Chart Wizard

• Click ‘Next’

Step 3 of the Chart Wizard

• In the ‘Titles’ tab - label your graph

• Click on the ‘Gridlines’ tab

Step 3 of the Chart Wizard, con’t.

• In the ‘Gridlines’ tab – uncheck all the boxes (this is OPTIONAL)

• Click on the ‘Legend’ tab

Step 3 of the Chart Wizard, con’t.

• In the ‘Legend’ tab – uncheck ‘Show Legend’

• Click ‘Next’

Step 4 of the Chart Wizard

• Click in the radio button next to ‘As new sheet’.

• Click ‘Finish’

Scatter Diagram• Now let’s add the trendline…

Attendance VS FCAT Levels

155

160

165

170

175

180

185

0 1 2 3 4 5 6

FCAT Level

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Adding the Trendline

• Click on ‘Chart’ in the toolbar• Click on ‘Add Trendline…’

Adding the Trendline, con’t.

• Click ‘OK’

Formatting the ‘Y’ Axis• Double click on any number in the ‘Y’ Axis• Enter your maximum value for your ‘Y’ Axis (ex: Attendance = 180)• Click ‘OK’

Formatting the ‘X’ Axis

• Double click on any number in the ‘X’ Axis

• Click checkmarks to uncheck everything

• Enter your maximum value for your ‘X’ Axis (ex: FCAT Level = 5)

• Enter the minimum value for your ‘X’ Axis (ex: FCAT Level = 1)

• Click ‘OK’

Here is your Scatter DiagramAttendance VS FCAT Levels

155

160

165

170

175

180

1 2 3 4 5

FCAT Level

Atte

ndan

ce: D

ays

Pre

sent