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According to a 2008 survey by the Pew Research Center, people in China are highly satisfied with their roaring economy and the direction of their nation (USA Today, July 22, 2008). Eighty-six percent of those who were surveyed expressed positive views of the way China is progressing and described the economic situation as good. A political analyst wants to know if this optimism among the Chinese depends on age. In an independent survey of 280 Chinese residents, the respondents are asked how happy they are with the direction that their country is taking. Their responses are tabulated below.
a. Set up the appropriate hypotheses to test the claim that optimism regarding China's direction depends on the age of the respondent.
b. Use Excel to compute the p-value for the test.
c. At a 1% level of significance, can we infer that optimism among the Chinese is dependent on age?
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