χ2 – Test for attributes:
H0: Vaccination and ** of T.B. are independent.
H1 : Vaccination and ** of T.B. are deperdent. {Upper tail test}
The given data can be written in a 2 × 2 – contingency table as below:
Under H0, the χ2 – test statistic is:
At α = 1% for l.d.f the upper tail critical value k2 = 6.63.
Here χ2cal **** rejection region
∴ H0 is rejected and H1 is accepted.
Conclusion: Vaccination and ** of T.B. are dependent.