Historically, about 53% of the population of a certain country believed that the planet's temperature was rising ("global warming"). A March 2010 poll wanted to determine whether this proportion ha changed. The poll interviewed 950 adults in the population, and 516 said they believed that global warming was real. (Assume these 950 adults represented a simple random sample.) Complete parts a through c below. a. What percentage in the sample believed global warming was real in 2010? p=% (Round to one decimal place as needed.) Is this more or less than the historical 53%? O less O more b. Test the hypothesis that the proportion of the population who believe global warming is real has changed. Use a significance level of 0.05. What are the null and alternative hypotheses? OA. Ho: p=0.53 Ha: p>0.53 OB. Ho: p<0.53 Ha: p>0.53 OC. Ho: P# 0.53 Ha: p=0.53 OD. Ho: p>0.53 Ha: p<0.53 (...) OE. Ho: p=0.53 Ha: p0.53

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