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. A scatterplot of change in blood pressure (mmHg)versus the type of music listened to is given below: What do we know about the correlation between change in blood pressure and type of music?
A)It is negative.
B)It is positive.
C)It is first negative then positive.
D)None of the above

Question

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. A scatterplot of change in blood pressure (mmHg)versus the type of music listened to is given below:  What do we know about the correlation between change in blood pressure and type of music?
A)It is negative. 
B)It is positive. 
C)It is first negative then positive. 
D)None of the above

Quizplus · Accepted Answer

The scatterplot does not show any clear trend or pattern, indicating that there is no significant correlation between change in blood pressure and type of music listened to.

Volunteers for a Research Study Were Divided into Three Groups