Scatter Plots. Example 2-16: Wet Bike Accidents A researcher is interested in determining if there is a relationship between the number of wet bike accidents.

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Presentation transcript:

Scatter Plots

Example 2-16: Wet Bike Accidents A researcher is interested in determining if there is a relationship between the number of wet bike accidents and the number of wet bike fatalities. The data are for a 10-year period. Draw a scatter plot for the data. Step 1: Draw and label the x and y axes. Step 2: Plot each point on the graph. Bluman, Chapter 2 2 No. of accidents, x No. of fatalities, y

Example 2-16: Wet Bike Accidents Bluman, Chapter 2 3 No. of accidents, x No. of fatalities, y

Analyzing the Scatter Plot Bluman, Chapter 2 4 (a) Positive linear relationship(b) Negative linear relationship (c) Nonlinear relationship(d) No relationship All over the place, no pattern

Scatter Plot on TI-84

Drawing the Scatter Plot 2 ND STAT PLOT Turn it “On” Pick Scatter plot picture 2 ND 1 is a shortcut for L 1 2 ND 2 is a shortcut for L 2 ZOOM 9:ZoomStat You can TRACE and arrow around the data.

Improve the WINDOW What we got by defaultSome Minor Improvements Then press GRAPH Nicer tick marks