Comprehension Passage
In a community, there was a leakage of chlorine in water pipes and many individuals were adversly impacted. Consequently, water borne infected cases in that community were flagged in media. Health Professionals visited the community and Surveyed the area. They came out with the idea that whole community can be divided into five strata with 10 households each. The observations were tabulated in the following manner consisting of household ID, no of person (n) in household, number of person Pi infected.
|
Household ID |
Stratas |
|||||||||
|
Strata 1 |
Strata 2 |
Strata 3 |
Strata 4 |
Strata 5 |
||||||
|
n |
P1i |
n |
P2i |
n |
P3i |
n |
P4i |
n |
P5i |
|
|
1 |
5 |
0 |
6 |
0 |
8 |
1 |
10 |
2 |
6 |
1 |
|
2 |
6 |
1 |
11 |
2 |
9 |
2 |
9 |
3 |
6 |
2 |
|
3 |
3 |
1 |
4 |
3 |
6 |
3 |
6 |
3 |
9 |
3 |
|
4 |
4 |
0 |
5 |
4 |
5 |
3 |
5 |
2 |
9 |
4 |
|
5 |
3 |
0 |
6 |
5 |
4 |
2 |
4 |
5 |
10 |
6 |
If an investigator wishes to estimate association between size(n) and infection (Pi) for any strata, which statistical measure will be required?
1
Quartile Deviation
2
Mean Deviation
3
Karl Pearson's Correlation Coefficient
4
Chi-Square