Suppose that three high school students separately conduct polls in their city to investigate if there is an association between being a vegetarian and whether people like to eat at home or eat at restaurants.
• Sally finds that 35 out of 45 vegetarians preferred to eat at home whereas 20 out of 105 nonvegetarians preferred to eat at home.

• Tara finds that 70 out of 90 vegetarians preferred to eat at home whereas 40 out of 210 nonvegetarians preferred to eat at home.
• Uma finds that 30 out of 45 vegetarians preferred to eat at home whereas 25 out of 105 nonvegetarians preferred to eat at home.

a. Comparing Sally’s study to Tara’s study: Who will find stronger evidence of a difference between vegetarians and nonvegetarians with regard to preference to eat at home? Answer without doing any extensive calculations. Choose one.

A. Sally
B. Tara
C. Th e strength of evidence will be similar.
D. Cannot be answered without fi nding a p-value

b. Comparing Sally’s study to Uma’s study: Who will find stronger evidence of a difference between vegetarians and nonvegetarians with regard to preference to eat at home? Answer without doing any extensive calculations. Choose one.
A. Sally
B. Uma
C. The strength of evidence will be similar.
D. Cannot be answered without finding a p-value