Scatter Diagrams

Need a scatter diagram to show a relationship between two variables:

Overtime and amount of work

Temperature and steam usage in a plant

Speed and miles per gallon

Density and purity of a product

Scatter Diagrams

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Scatter Diagrams and SPC for Excel

Our SPC software, SPC for Excel, easily creates scatter diagrams.   A scatter diagram gives a visual picture of the relationship between two variables.  One variable is plotted on the x axis and one on the y axis.  The paired results can show a positive correlation, a negative correlation or no correlation.   The p value for the best fit line helps determine if the correlation is significant.

Scatter Diagram Features

Include best fit line

Add labels to each point

Update easily when new data is entered

Add dates of data collection