Exercise 11: Interpreting Scatterplots
1. Why might researchers choose to include a scatterplot in the publication of their study?
-Because scatterplots describe relationships between two variables and proved a graphic
representation of data from the study. It can indicate the direction (positive or negative) and
the strength of the relationship between the two variables studied.
2. Identify the x-variate and the y-variate presented in the Figure 2 of the Kriikku et al.
(2014)
study.
-x-variate: venous BAC, y-variant: BAC estimated by analysis of breath
3. What type of relationship (positive or negative) does Figure 2 illustrate? Provide rationale.
-Positive relationship as plotted points form a line that extends from the left lower corner to
the right upper corner. An increase in venous blood alcohol concentrations is associated with
1. Why might researchers choose to include a scatterplot in the publication of their study?
-Because scatterplots describe relationships between two variables and proved a graphic
representation of data from the study. It can indicate the direction (positive or negative) and
the strength of the relationship between the two variables studied.
2. Identify the x-variate and the y-variate presented in the Figure 2 of the Kriikku et al.
(2014)
study.
-x-variate: venous BAC, y-variant: BAC estimated by analysis of breath
3. What type of relationship (positive or negative) does Figure 2 illustrate? Provide rationale.
-Positive relationship as plotted points form a line that extends from the left lower corner to
the right upper corner. An increase in venous blood alcohol concentrations is associated with
