1. The Green Fields restaurant is a very popular place for vegetarian dining in the bay area for its farm to table concept and recipes infused with fresh and local produce. The restaurant only serves three dishes for lunch described as follows:
   • Japanese Miso-Glazed Eggplant Burgers with Fresh Pickles
   • Curried Zucchini Soup with Parmesan Croutons
   • Brown Rice with Lentils and Tomato Salsa

On a sunny Saturday afternoon, Green Fields served 225 customers for lunch. Later that same day, several customers visited a nearby hospital with symptoms of food poisoning. According to the restaurant and hospital records, the following table was generated:

Food	Number of persons who ate the specified food	Number of persons who did not eat the specified food
	Ill Not Ill Total	Ill Not Ill Total
Miso-Glazed Eggplant Burgers	10 52 62	93 70 163
Zucchini soup	3 60 63	100 62 162
Brown rice with lentils and tomato salsa	90 10 100	13 112 125

1A. Calculate the proportion of people who got ill. Please, show your work. (2 points)

1B. Is this a measure of prevalence or incidence? Please explain your answer. (1 point)

This is a measure of incidence due to the proportion of an initially disease-free population that later developed during a later period.

1C. Calculate the incidence proportion for each specific dish. (3 points)

Food	Incidence proportion
Miso-Glazed Eggplant Burgers
Zucchini soup
Brown rice with lentils and tomato salsa

1D. Fill the table and calculate the relative risk (RR) and the odds ratio (OR). (6 points)

Food	Exposed- Ill	Exposed- Not Ill	Unexposed- Ill	Unexposed- Not Ill	RR	OR
	a	b	c	d
Miso-Glazed Eggplant Burgers
Zucchini soup
Brown rice with lentils and tomato salsa

1E. Based on the relative risk and the odds ratio, which dish would most likely be the cause of the food poisoning? (1 point)