11.22 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? DaysWorkedDays Worked Last Year by 23 EmployeesDepartment Days WorkedBudgets (5 workers) 278 260 265 245 258Payables (10 workers) 205 270 220 240 255 217 266 239 240 228Pricing (8 workers) 240 258 233 256 233 242 244 249
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