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Suppose Researchers at a local health department are interested in the relations

ID: 3269667 • Letter: S

Question

Suppose Researchers at a local health department are interested in the relationship between intravenous drug use (IDU) and hepatitis C in the population in their jurisdiction. Suppose after a thorough survey of 5,498 participants, they determine that 432 out of the 687 participants surveyed indicating heroin use developed hepatitis C in the past 5 years. Assume the prevalence of Hepatitis C in the population was deemed to be 14.57%.

A) Construct a 2x2 table for the results of the survey.

B) Calculate expected counts for each cell in the two-by-two table.

Do by hand (not SPSS) - Show all work, even if you use a calculator.

Explanation / Answer

Ans:

Observed frequency:

Expected frequency=row total*column total/overall total

Hepatitis C Not Hepatitis C Total IDU 432 255 687 No IDU 369 4442 4811 Total= 801 4697 5498
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