Question

A follow-up study was conducted on 3000 military troops deployed at an atomic test site in Nevada to detect the occurrence of leukemia. A total 1870 people were successfully traced by investigators, and 443 contacted the investigators on their own as a result of publicity about the study. 4 cases of leukemia occurred among the 1870 people traced, and an additional 4 occurred among those individuals who contacted investigators on their own. Could this be subject to bias?

Answer 1

Answer:

The probability of the study result being subject to bias while interpreting -------- it's a YES

Explanation:

Probability of Leukemia

A. Among traced group

= 4/1,870 persons.

B. Among self-reported group

= 4/443 person.

We can deduce

A higher rate of occurrence in self-reported group which could be causesd by fear of leukemia occurrence or suspicion of their previous exposure at atomic sites