In a survey to determine child care costs for working parents, the local Chamber of Commerce randomly samples licensed child care centers in four regions of the metropolitan area. The purpose of the survey is to see whether and how average child care expense varies according to region. The following figures are the weekly costs of child care for a 2-year-old:
Suburban East Downtown Area Suburban West Suburban South
90.00 94.00 82.00 86.50
87.50 97.50 84.50 88.00
89.50 94.00 88.00 89.50
90.00 92.50 85.50 85.00
Establish whether average costs are equal across the four regions; if not, do a follow-up analysis to determine which are the same and which differ. (Use α =0.10). List all necessary assumptions and indicate which might be suspect. Also perform a non-parametric analysis.
Verify your results using SAS.