17-871s12.jpg
Description:
Let us say we drew a sample of 1,500 adults and asked them if they approved of the way Barack Obama was handling his job as president. Can we estimate the percentage of all American adults who approve? Image by Christopher Dilts on flickr.
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17-871s12.jpg
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In a crowd, President Obama shakes hands.
Caption:
Let us say we drew a sample of 1,500 adults and asked them if they approved of the way Barack Obama was handling his job as president. Can we estimate the percentage of all American adults who approve? (Image by Christopher Dilts on flickr.)
Credit:
Image by Christopher Dilts on flickr.
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Spring
2012
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