Chi square analysis on occurrences of a rare disease in an rural area of 1000 people vs. national averages for this rare disease. Data is based on different age groups:
National Avg.
| Age Ranges |
% with disease |
0
| 2% |
|
20
| 5% |
|
40
| 15% |
|
| age >60 |
20% |
Rural
| Age Ranges |
% with disease |
0
| 30 |
|
| 20< age
| 200 |
40
| 220 |
|
| age >60 |
185 |
Looking at national data, what is expected value of rural with disease?
Is disease incidence significantly different than national?
What are standardized residuals?
Interpret results.