Please find the average wait time and the standard deviation.

3) A doctor's office studied the length of time that their patients wait in the waiting room before being called back to see the doctor. Some data was collected on 250 of the patients and the results are given below. Length of Wait (in minutes) Number of Patients 5 9 15 74 25 49 35 68 45 50 Find the sample mean and sample standard deviation Patients have an average wait time of 28 minutes per visit with a standard deviation of i 11.94 Patients have an average wait time of 29.6 minutes per visit with a standard deviation of : 12.15 Patients have an average wait time of 28 minutes per visit with a standard deviation of i 11.91 Patients have an average wait time of 56 minutes per visit with a standard deviation of i 26 Patients have an average wait time of 25 minutes per visit with a standard deviation of i 14.14 Patients have an average wait time of 25 minutes per visit with a standard deviation of i 15.81 *CDQCU'W