A scatter plot with proportional symbols can be used to plot the total number of leaks versus the total length of pipes in each zone, with the size of the points representing the cost per day.ĭrag a number field to your page and drop it on your scatter plot to give your chart graduated symbols. The department also wants to know whether there is a relationship between the number of leaks or length of pipes and the cost per day (including construction, maintenance and repairs, and lost resources through leaks). The department wants to know how much of an effect the total length of pipes has on the number of leaks versus the impact of properties of the pipes, such as age or circumference. The R 2 value can be added to give a measure of the impact of the length of pipes on the number of leaks.Ī public works department has noticed an increase in leaks on water mains. Statistical models are illustrated with a straight or curved line, depending on your selected chart statistic. The scatter plot indicates that most of the pipe surveys occurred in April.Ī scatter plot can use regression analysis to estimate the strength and direction of the relationship between dependent and independent variables. Using the Color by option, the department can style the points using unique colors for every unique value in the specified field.
The public works department also wants to know whether there is any difference between pipes surveyed at different times of the year. A scatter plot can be used to plot the total number of leaks versus the total length of pipes in each zone. The department wants to know how much of an effect the total length of pipes has on the number of leaks compared to the impact of properties of the pipes, such as age or circumference. Two variablesĪ public works department has noticed an increase in leaks on water mains. The examples below show scatter plots using two variables, three variables, and bins. Scatter plots can answer questions about your data such as, What is the relationship between two variables? How is the data distributed? Where are the outliers? Examples The x-axis represents the independent variable, and the y-axis represents the dependent variable. Scatter plots are used to determine the strength of a relationship between two numeric variables.
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