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Satisfied? A 2010 poll asked people of a certain region whether they were satisfied with their financial situation. A total of 341 out of 829

Satisfied?A 2010 poll asked people of a certain region whether they were satisfied with their financial situation. A total of 341 out of 829

people said they were satisfied. The same question was asked in 2012 and 302 out of 1160

people said they were satisfied.

Part 1 of 2

(a) Construct an 80% confidence interval for the difference between the proportions of adults who said they were satisfied in 2012 and 2010

. Let p1 denote the proportion of adults who said they were satisfied in 2010 and let p2 denote the proportion of adults who said they were satisfied in 2012

. Use the TI-84 Plus calculator and round the answers to three decimal places.

An

80%

confidence interval for the difference between the proportions of adults who said they were satisfied in

2012

and

2010

is

<p1- p2<

.

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