Question: Opinions about evolution. A sample survey funded by the National Science Foundation asked a random sample of American adults about biological evolution. One question asked subjects to answer “True,” “False,” or “Not sure” to the statement “Human beings, as we know them today, developed from earlier species of animals.” Of the 1484 respondent, 594 said “True.”

a) What can you say with a 95% confidence about the percent of all American adults who think that humans developed from earlier species of animals?

b) Does this example give good evidence to support the claim that “Fewer than half of American adults think that humans developed from earlier species of animals”?