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Researchers wanted to study if wearing cotton clothes is related to depression. They surveyed a large...

Researchers wanted to study if wearing cotton clothes is related to depression. They surveyed a large group of people. The data are shown in the contingency table below. What is the relative risk of wearing cotton clothes for those who are depressed? Round your answer to two decimal places.

CottonNot cottonTotalDepressed122420542Not depressed189263452Total311683994

Math   Statistics-And-Probability   
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Answer #1

The data is as shown in the below table:

Cotton Not cotton Total
Depressed 1224 20542 21766
Not Depressed 1892 63452 65344
Total 3116 83994 87110

The formula for relative risk of wearing cotton clothes for those who are depressed is:

Here, being depressed or not depressed is the predictor variable and wearing cotton clothes or not is the outcome

RR = (1224/21766)/(1892/65344) = 1.942

The relative risk is 1.942

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