



 
Hi Dani, I can help you get started with this problem. This is a question about the proportion of American voters who preferred the Democratic party at the time the poll was taken. I am going to call this proportion p. The instructions say "test the claim that less than 50% of American voters preferred the Democratic candidate" or, stated using the proportion p, "test the claim that p < 0.5". Hence the hypothesis test is to choose between two alternatives:
The null hypothesis is always the alternative that contains the equal sign and hence the answer to a. is p ≥ 0.5 and the answer to b. is p < 0.5 . I hope this helps,  


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