A company is interested in understanding when its employees are likely to retire. This company conducts an internal investigation and finds that 27 of its employees have recently retired. The average retirement age of these employees was 63, with a standard deviation of 5 years. In addition, the average retirement age in this country (across all companies) is 65 years. . Using this information, answer questions #11 - 17. - 11. How many degrees of freedom do we have for this one-sample t-test