Question 12 Find the mean for the given sample data. Unless indicated otherwise, round your answer to one more decimal place than i present in the original data values. Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age. 52 63 67 50 59 58 65 51 56 58.0 yr O 57.3 yr O 57.9 yr 56.6 yr