BEYOND THE NUMBERS 2.15 | LEARNING OUTCOMES 4 TO 7 MOE in Practice Name: Section
ID: 3367606 • Letter: B
Question
BEYOND THE NUMBERS 2.15 | LEARNING OUTCOMES 4 TO 7 MOE in Practice Name: Section Number to be graded, all assignments must be completed and subrmitted on the original book page. EXHIBIT 1 Is It Warm in Here? Title: Author: Americans Do Care About Climate Change Annie Leonard Source: New York Times May 8, 2014. http://www.nytimes com/roomfordebate/2014/05/08/climate-debate- isnt-so-heated-in-the-us/americans-do-care-about climate-change. The following is an excerpt from the New York Times article: Americans do care about climate change. Polls showing lower levels of concern than in some countries don't tell the whole story. I travel widely around the U.S., attending meetings at schools, churches and community gatherings. Everywhere I go, I see people who are not only concerned about climate change, but are actively working on solutions. Nearly two-thirds (67%) of Americans accept the scientific evidence of global warming; fewer than one in six remain in denial. Two-thirds of Americans, including a majority of Republicans, want stricter limits on air pollution from power plants The full report referenced by Leonard's article tells us that the original survey was conducted by the Pew Research Center in October 2013, There was a (95%) margin of sampling error of about 2.9% associated with the entire sample. Questions 1. What are the Pew Center poll's sample and statistic?Explanation / Answer
solving first 4
a)
the sample is 1504 people the statsitc is proportions
b)
population is the american people statsitc is the proportion of people who belive in global warming
c)
95% CI
p=.44
var = sqrt(p*(1-p)/n) sqrt(.44*(.56)/1504) = 0.0127996
so CI = .44 - 1.96* 0.0127996, .44+1.96* 0.0127996
0.4149128, 0.4650872
4)
we we create subgroups the total number of people in the group decrease i.e.
say p/n as n decrease the proportion p/n increases
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