Researchers are conducting a study to see if exposure to an occupational toxin leads to brain tumors. The researchers recruit 1,000 men who work at a steel factory (all of whom do not have a brain tumor in 2000) and use questionnaires as well as measuring devices to see who is exposed to the occupational toxin Airflyte. After the baseline assessment, 493 of the workers were exposed to Airflyte while the others were not. After 10 years of follow up, 308 of the workers exposed to Airflyte developed brain tumors while 77 of the men not exposed to Airflyte developed brain tumors. Set up a 2x2 table with the data given.

Answers

Answer 1
Answer:

Answer:

Explanation:

Based on the information provided, we can set up a 2x2 table to summarize the data as follows:

| Brain Tumor | No Brain Tumor | Total

--------------------------------------------------------

Exposed to Airflyte | 308 | 185 | 493

--------------------------------------------------------

Not Exposed | 77 | 430 | 507

--------------------------------------------------------

Total | 385 | 615 | 1000

In this table, the rows represent the exposure status (exposed to Airflyte or not exposed), and the columns represent the occurrence of brain tumors (brain tumor or no brain tumor). The totals are calculated for each category.

Please note that the numbers provided in the table are based on the given data and do not reflect any statistical analysis or conclusions about the relationship between exposure to Airflyte and the development of brain tumors. Further statistical analysis, such as calculating risk ratios or conducting hypothesis tests, would be necessary to determine the strength of the association between the exposure and outcome variables.

Answer 2
Answer:

Final answer:

A 2x2 table is set up to represent the brain tumor occurrence and non-occurrence in workers who were and were not exposed to the occupational toxin Airflyte. There were 308 cases of tumors in the exposed group and 77 in the non-exposed group. The rest did not develop tumors.

Explanation:

In conducting this study, the researchers divided the 1,000 men into two groups: those exposed to the occupational toxin Airflyte and those not exposed. By using a 2x2 table, we can clearly illustrate the results obtained after the 10-year follow up. Here's how it looks:

   With Brain Tumor Without Brain Tumor    

Exposure to Airflyte

308 493 - 308 = 185  

No Exposure to Airflyte

77 507 - 77 = 430  

This table helps to visualise the observed differences in brain tumor development among the workers who were exposed to the toxin compared to those who weren't exposed.

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Answer:

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Explanation:

Answer:

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Final answer:

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Explanation:

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