Adults were randomly selected for a newsweek poll. they were asked if they "favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos." of those polled, 481 were in favor, 401 were opposed, and 120 were unsure. a politician claims that people do not really understand the stem cell issue and their responses to such questions are random responses equivalent to a coin toss. exclude the 120 subjects who said that they were unsure, and use a 0.01 significance level to test the claim that the proportion of subjects who respond in favor is equal to 0.5. what does the result suggest about the politicians claim?