Reference no: EM133636733

Question 1. Determine the direction of the bias (towards, away, or switchover).

Observed OR	True OR	Direction of Bias
1.7	2.5
2.0	2.9
0.5	1.1

Question 2. One hundred and fifty people attended a charity luncheon in which two different menus were served. A total of 82 attendees reported symptoms including nausea, vomiting, abdominal cramps and diarrhea. Most of the 82 patients who became sick reported symptoms about six hours after the beginning of the luncheon. The symptoms lasted from four to seven hours. The dishes that were served included baked chicken, meat loaf, mashed potatoes and green beans. The table below shows the data collected from this investigation.

	Ate Food Item					Did Not Eat Food Item
Food Item	Ill	Not Ill	Total	Attack Rate		Ill	Not Ill	Total	Attack Rate	Relative Risk
Meat Loaf	13	65				64	8
Baked Chicken	64	8				13	65
Mashed Potatoes	11	56				36	31
Green Beans	32	18				35	31

1. Calculate in the table above the attack rates per 100 for those who ate and did not each food item.

2: Calculate the relative risk of disease for each food item.

3: Identify the food item(s) responsible for the outbreak.