Have you ever donated blood? If so, how often do you donate blood? Studies have looked at who is more likely to donate blood: men or women? Suppose that three students, Eddie, Francisco, and Gina, each decide to take random samples of men and women and ask each of the participants whether they have donated blood in the past 12 months.
• Eddie finds that 20 of 100 men and 15 of 100 women in his study have donated blood in the past 12 months.

• Francisco finds that 25 of 100 men and 23 of 100 women in his study have donated blood in the past 12 months.

• Gina finds that 40 of 200 men and 30 of 200 women in her study have donated blood in the past 12 months.
a. Comparing Eddie’s study to Francisco’s study: Who will find stronger evidence of a difference between men and women with regard to probability of donating blood?
Answer without doing any extensive calculations. Choose one.
A. Eddie
B. Francisco
C. The strength of evidence will be similar.
D. Cannot be answered without finding a p-value

b. Comparing Eddie’s study to Gina’s study: Who will find stronger evidence of a difference between men and women with regard to probability of donating blood? Answer without doing any extensive calculations. Choose one.

A. Eddie
B. Gina
C. The strength of evidence will be similar.
D. Cannot be answered without fi nding a p-value