Bivariate Data &amp; Scatter Plots

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# Bivariate Data & Scatter Plots - PowerPoint PPT Presentation

Bivariate Data &amp; Scatter Plots. Learn to take bivariate data to create a scatter plot for the purpose of deriving meaning from the data. Scatter Plot. What is a scatter plot? A scatter plot is a graph that shows the relationship between two sets of data.

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### Bivariate Data & Scatter Plots

Learn to take bivariate data to create a scatter plot for the purpose of deriving meaning from the data.

Scatter Plot
• What is a scatter plot?
• A scatter plot is a graph that shows the relationship between two sets of data.
• Each point on the graph is an ordered pair. (x, y)
• By how the points are grouped or not grouped, you can determine if the data is related.
• Types of correlation:

NO CORRELATION

POSITIVE

NEGATIVE

Example 1:
• 8 people were surveyed to find their shoe size and height.
• It’s hard to see a relationship between all of this data, so lets look at it as a scatter plot.
• Shoe size will be our “x” and height will be our “y.” This will make an ordered pair.
Example 1 continued…
• Plot the data from the table onto the graph.
• What can you conclude from this data?
• According to our data, the height of a person is related to their shoe size.
• Generally, the larger the shoe size, the taller the person.
Activity: Ice Cream & Temperature
• An ice cream shop keeps track of how much ice cream they sell versus the temperature on that day. Here are their figures for the last 12 days:
• What can you conclude from this data?
• If we take this data and create a scatter plot, we will be able to draw a conclusion.
• Each student will plot this data on a scatter plot.
Scatter Plot…
• What can you conclude from this data?
• It is now easy to see that warmer weather leads to more sales .