Volunteers for a Research Study Were Divided into Three Groups

question 43

Multiple Choice

Volunteers for a research study were divided into three groups.Group 1 listened to Western religious music,Group 2 listened to Western rock music,and Group 3 listened to Chinese religious music.The blood pressure of each volunteer was measured before and after listening to the music,and the change in blood pressure (blood pressure before listening minus blood pressure after listening) was recorded. What could we do to explore the relationship between type of music and change in blood pressure?

• A)See if blood pressure decreases as type of music increases by examining a scatterplot.
• B)Make a histogram of the change in blood pressure for all of the volunteers.
• C)Make side-by-side boxplots of the change in blood pressure,with a separate boxplot for each group.
• D)All of the above

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