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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.

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bivariate data scatter plots

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
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
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
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
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 plot1
Scatter Plot…
  • What can you conclude from this data?
  • It is now easy to see that warmer weather leads to more sales .
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