Satisfied? A 2010 poll asked people of a certain region whether they were satisfied with their financial situation. A total of 342 out of

831 people said they were satisfied. The same question was asked in 2012, and 297 out of

1159

people said they were satisfied.

Part 1 of 2

(a) Construct a 99.8% 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.

A

99.8%

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

2012 and 2010 is

<p1-p2<

.

Part 2 Does it contradict or not contradict?

Part 3 Do we reject or not reject?

Part 4 Is there a P- value?