Use the sign test for the claim involving nominal data. Stem Cell Survey Adults randomly selected for a Newsweek poll were asked if they “favor or oppose using federal tax dollars to fund medical...

Use the sign test for the claim involving nominal data.

Stem Cell Survey
Adults randomly selected for a Newsweek poll were asked if they “favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos.” Of the subjects surveyed, 481 were in favor, 401 were opposed, and 120 were unsure. A politician claims that people don’t really understand the stem cell issue and their responses to such questions are random responses equivalent to a coin flip. 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 politician’s claim?