Praxis 5003 Practice Test Practice Question
Which of the following types of graphs is most appropriate to display data on the age and blood pressure of several individuals and to determine whether a correlation exists between age and blood pressure?
Correct Answer: B
Rationale: A scatterplot is ideal for displaying the relationship between two continuous variables, such as age and blood pressure, allowing for the visualization of any correlation.
A bar graph is unsuitable here as it compares categorical data rather than showing relationships between two continuous variables.
A circle graph, or pie chart, is designed for illustrating proportions of a whole, making it ineffective for analyzing correlations between age and blood pressure.
A box-and-whisker plot summarizes data distributions but does not effectively illustrate the relationship between two variables, making it less appropriate for this analysis.
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