Suppose that a the normal rate of infection for a certain disease in cattle is 25%. To...

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Suppose that a the normal rate of infection for a certaindisease in cattle is 25%.
To test a new serum which may prevent infection, three experimentsare carried out. The
test for infection is not always valid for some particular cattle,so the experimental results are
â€œinconclusiveâ€ to some degreeâ€“we cannot always tell whether a cowis infected or not. The
results of the three experiments are
(a) 10 animals are injected; all 10 remain free frominfection.
(b) 17 animals are injected; more than 15 remain free frominfection and there are two doubtful
cases.
(c) 23 animals are infected; more than 20 remain free frominfection and there are three
doubtful cases.
Which experiment provides the strongest evidence in favour of theserum? Explain your answer.

Answer & Explanation Solved by verified expert

3.9 Ratings (665 Votes)

HereFor the first experiments10 animals are injected all 10 remain free frominfectionProportion of doutful cases 010 0Value of test statistics Z 0 025 See Answer

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