The XYZ Corporation is interested in possible differences in days worked by salaried employees in three departments in the financial area.

The XYZ Corporation is interested in possible differences in days worked by salaried employeesin three departments in the financial area. A survey of 23 randomly chosen employees reveals thedata shown below. Because of the casual sampling methodology in this survey, the sample sizesare unequal. Research question: Are the mean annual attendance rates the same for employees inthese three departments?