Question

A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 242 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related?

Vaccination Status	Diseased	Not Diseased	Total
Vaccinated	48	91	139
Not Vaccinated	62	41	103
Total	110	132	242

H0: vaccination and disease status are independent

Ha: vaccination and disease status are dependent

E(n1,1)=63.2 E(n1,2)=75.8

Step 4 of 8 : Find the value of the test statistic. Round your answer to three decimal places.

Step 5 of 8: Find the degrees of freedom associated with the test statistic for this problem.

Step 6 of 8: Find the critical value of the test at the 0.01 level of significance. Round your answer to three decimal places.

Step 7 of 8: Make the decision to reject or fail to reject the null hypothesis at the 0.01 level of significance.

Step 8 of 8: State the conclusion of the hypothesis test at the 0.01 level of significance.

Answer 1