An online book store wants to determine if coupon redemption is independent of gender.

After a special coupon broadcast to its reward members, the following data on coupon

redemption at checkout were collected.

Coupon Redeemed?

Yes

No

Total

Gender

Male

65

65

130

Female

125

75

200

Total

190

140

330

a) Which of the following statements is an appropriate null hypothesis? Check all that

apply.

__ A. Coupon redemption is independent of gender.

__ B. Coupon redemption and gender are not associated.

__ C. The proportion of males who redeem coupons equals the proportion of

females who redeem coupons.

__ D. Coupon redemption and gender are correlated.

b) Find the expected frequencies under the assumption that the null hypothesis is true