Final answer:
A scatter diagram is the most appropriate data display technique in this case. option A
Step-by-step explanation:
A quality improvement manager must decide how to present data that demonstrates the relationship between two process characteristics. The most appropriate data display technique in this case would be a scatter diagram.
A scatter diagram is used to show the relationship between two variables and helps to identify any patterns or trends. It is particularly useful when studying the correlation between two process characteristics.
By plotting the data points on a scatter diagram, the quality improvement manager can visually observe the relationship between the two process characteristics and make informed decisions based on the analysis. Option A