The data shows the number of years that 30 employees worked for an insurance company before retirement. is the population mean for the number of years worked, and % of the employees worked for the company for at least 10 years. (round off your answers to the nearest integer.)the data shows the numbers of years that 30 employees worked for an insurance company before retirement.   is the population mean for the number of years worked, and     % of the employees worked for the company for at least 10 years