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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 had changed. The poll interviewed 910 adults in the population, and 524 said they believed that global warming was real. (Assume these 910 adults represented a simple random sample.) Complete parts a through (2 below. a. What percentage in the sample believed global warming was real in 2010? $= % (Round to one decimal place as needed.) Is this more or less than the historical 53%? O less 0 more b. Test the hypothesis that the proportion of the population who believe global warming is real has changed. Use a signicanoe level of 0.05. What are the null and alternative hypotheses? O A. H0: po.53 Ha: p = 0.53 O B. H0: p>o.53 Ha: p 0.53 O E. Ho:p=0l53 Ha: p>0l53 Determine the ztest statistic, using the value for E from part a. z= (Round to two decimal places as needed.) Find the p-value' p-value = (Round to three decimal places as needed.) Do you reject or not reject the null hypothesis? 0 Reject Ho. 0 Do not reject H0. or Choose the correct interpremtiont O A. In 2010, the percentage of the population who believe global warming is real is signicantly different from 53%. O B. In 2010, the percentage of the population who believe global warming is real has not changed from the historical level of 53%