A national survey conducted in 2011 among a simple random sample of 1,507 adults shows that 56% of Americans think the Civil War is still relevant to American politics and political life. Conduct a hypothesis test at significance level a=0.05 to determine whether these data provide strong evidence that a majority of American adults think the Civil War is still relevant. a) Is the number 0.56 a parameter or a statistic? Statistic Parameter b) We will conduct a one-sided hypothesis test to evaluate the claim above. First state appropriate null and alternative hypotheses? O Ho: P = 0.5; H: p 0.5 O H: p = 0.56; H : p > 0.56 O Ho: P = 0.56; Ha: p 0.5. A 99% confidence interval for the true proportion p will contain the value 0.56. We must fail to reject the null hypothesis