Standard Deviation

QUESTION 7 11 points Save An John listens to a variety of music, including easy listening, classical, and pop/rock. These are the lengths of some of his favorite albums for each of these categories: Easy Listening Classical Pop/Rock 39 67 47 60 76 47 40 51 66 56 51 50 41 36 78 55 61 41 What is the standard deviation of the "easy listening" data set? (Round your answer to one place past the decimal.)