The resting heart rate of 60 patients is shown in the frequency table below.

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A.The standard deviation is 9.27. The typical heart rate for the data set varies from the mean by an average of 9.27 beats per minute.

B.The standard deviation is 13.69. The typical heart rate for the data set varies from the mean by an average of 13.69 beats per minute.

C.The standard deviation is 9.27. The heart rate of a randomly selected patient varies from the mean by 9.27 beats per minute.

D.The standard deviation is 13.69. The heart rate of a randomly selected patient varies from the mean by 13.69 beats per minute.