Scatter plot is a graph where in two variables are plotted against X and Y Axes. The plotted data might reveal the correlation between the two variables plotted.
Scatter plots are similar to line graphs. The only difference is a line graph has a continuous line while a scatter plot has a series of dots.
This type of plot is used to identify relationship between the two variables. The relationship could indicate the following:
Shape – Linear, Curved, etc.,
Direction – Positive or Negative
Presence of Outliers
When do we use it?
When we need to understand the cause-and-effect relationship
When we need to understand the relationship between two variables.
Age and weight
Variation in sales based on certain conditions (E.g., Temperature in the City, Event,etc.,)
Increase in adoption of telephones over the years
Example of Scatter Plot done in Excel:
In the next post we will see how we can do the same with “R”.