The mean number of sick days an employee takes per year is believed to be about 10. Members of a personnel department do not believe this figure. They randomly survey 8 employees. The number of sick days they took for the past year are as follows:
12; 4; 15; 3; 11; 8; 6; 8.
Let x = the number of sick days they took for the past year. Should the personnel team believe that the mean number is about 10?