Pulse rates of women are normally distributed with a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per minute. Answer the following questions. What are the values of the mean and standard deviation after converting all pulse rates of women to z scores using z equals StartFraction (x minus mu )Over sigma EndFraction ​? mu equals nothing sigma equals nothing The original pulse rates are measure with units of​ "beats per​ minute". What are the units of the corresponding z​ scores? Choose the correct choice below. A. The z scores are measured with units of​ "beats." B. The z scores are measured with units of​ "minutes per​ beat." C. The z scores are measured with units of​ "beats per​ minute." D. The z scores are numbers without units of measurement.