7. The following table cross-classifies pregnant women in the study by their body mass index (BMI) at 16 weeks gestation and whether they had pre-term delivery. What proportion of women with BMI greater than 35 delivers pre-term?

BMI < 30

BMI 30-34.9

BMI 35+

Pre-term

480

70

130

Full term

4800

460

280

A)0.0867

B)0.293

C)0.317

D)0.429

8. High density lipoprotein (HDL) in healthy males follows a normal distribution with a mean of 50 and a standard deviation of 10. What proportion of healthy males has HDL exceeding 65?

A)0.067

B)1.00

C)0.493

D)0.293

9. An experimental drug has been shown to be 85% effective in eliminating symptoms of allergies in animal studies. A small human study involving eight participants is conducted. What is the probability that the drug is effective on half of the participants?

A)0.132

B)0.493

C)0.40

D)0.0185

10. A national survey of graduate students is conducted to assess their consumption of coffee. The following table summarizes the data. What proportion of coffee drinkers (caffeinated and decaffeinated) is female?

Do Not Drink Coffee

Drink Decaffeinated Only

Drink Caffeinated Coffee

Male

145

94

365

Female

80

121

430

A)0.70

B)0.50

C)0.90

D)0.546