# Please answer both:) 2. In a recent survey, we are 95% confident the population percentage of...

###### Question:

2. In a recent survey, we are 95% confident the population percentage of all adults that believe in UFO's is between 18.25% and 20.75%. a. Determine the Best point Estimate. b. Determine the Margin of Error. 3. In a March 2010 poll of 1600 American adults, 1088 described themselves as "totally happy" (this category included both very happy" or "somewhat happy” responses) Use STATCRUNCH to construct a 95% confidence interval for the proportion of American adults who describe themselves as "totally happy." a. Best Point Estimate b. Margin of Error for a 95% confidence level. c. Construct the 95% confidence interval for the proportion of American adults who describe themselves as "totally happy". Statement: (Round to 4 decimal places.) d. Can we safely say that more than half of American adults describe themselves as "totally happy"?

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