What is Scatter Diagrams?

2017-08-17 17:33:34 viya 109

Scatter diagrams are simple graphical methods used to study relationships between two variables. They can quickly determine if a relationship exists (positive or negative) and the strength of that relationship (correlation).

Scatter Diagrams

Scatter diagram procedures are:

Decide how many points to plot. A minimum of 30 points is needed to make conclusions significant.

Arrange the pairs of measurements in ascending value of x. Divide data into subgroups of x.

Draw and label horizontal and vertical axes. Choose the proper scale to fit all points.

If the diagram shows an upward trend, there is a positive correlation. A downtrend is negative, and a level trend implies no correlation between variables.

It might be necessary to plot logarithmic scales or many y points to

a single x point to show data.

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TAG:   Scatter Diagrams

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