An epidemiologist is investing a foodborne outbreak and wants to determine the r
ID: 3394556 • Letter: A
Question
An epidemiologist is investing a foodborne outbreak and wants to determine the relative odds of a diagnosis of salmonellosis for those who ate ice cream and those who did not. Her investigation produced the following contingency table. Construct a 95% confidence interval for the relative odds. Use it to determine if ice cream consumption and a diagnosis of salmonellosis are associated. Your answer must include a point estimate, standard error, and upper and lower boundaries. Provide your answers in the table below. All numeric values must be rounded to the nearest hundredth. Note that in this case, a confidence interval that includes zero (0) is evidence of independence.
Diagnosis of salmonellosis
Ice cream eaten
Yes
No
Yes
10
13
No
17
45
Answer
Point estimate
Standard error
Lower boundary
Upper boundary
Conclusion
Diagnosis of salmonellosis
Ice cream eaten
Yes
No
Yes
10
13
No
17
45
Explanation / Answer
point estimate 1.586
Standard error 0.315
Lower boundary 0.855
Upper boundary 2.940
conclusion: we can notice that the point estimate is well inside the confidence interval.