Statistical data analysis
The serology data were tabulated, graphically presented, and descriptive statistics done to demonstrate the proportions of cattle that were seropositive to the five abortigenic agents. In addition, the Z score test for two proportions was applied to evaluate the level of significance in the difference between the proportion of C. burnetii -seropositive cattle that had a history of abortion and the proportion of C. burnetii -seropositive cattle that did not have a history of abortion (p value 0.01).
Refer to the formula below relating to the test hypothesis: Null hypothesis; H₀: p₁ - p₂ = 0; Alternative hypothesis H₁: p₁ - p₂ > 0