Answer: 0.27
Explanation: The correlation coefficient refers to a statistical measure used to determine or tell the strength of the relationship between two variables.
The coefficient of correlation usually denoted as R ranges from the value of (-1 to +1) with a correlation coefficient of -1 and +1 denoting a strong negative and strong positive correlation between examined variables respectively. Value of 0 means no correlation exists. The closer the value of the correlation coefficient to (-1 or +1), the stronger the relationship between the two variables.
In the question above 0.27 is the correlation coefficient value which shows relationship between listening to music and happiness.
-1 and - 0.27 means correlation between happiness and not listening to music.
0 means no correlation.