Do Americans prefer name-brand milk or store brand milk? A survey was conducted by Harris Poll Interactive, Inc. in November 2014. Suppose the results, based on 1,138 females and 1,138 males, were as follows:

a. Given that an American is a male, what is the probability that he prefers name-brand milk?
b. Given that an American is a female, what is the probability that she prefers name-brand milk?
c. Is preference independent of gender? Explain.

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GENDER PREFERENCE Name-Brand Milk Store Brand Milk Something Else Total Male Female Total 341 148 319 717 649 EXS TS 1:138 2276 660 1,138