Final answer:
A positive correlation between height and blood pressure would be demonstrated if health psychologists found that tall people have higher blood pressure than shorter people.
Step-by-step explanation:
A positive correlation between height and blood pressure would be demonstrated if health psychologists found that tall people have higher blood pressure than shorter people. A positive correlation means that as one variable increases, the other variable also increases. In this case, if taller individuals tend to have higher blood pressure, it suggests that there is a positive relationship between height and blood pressure.