6. Suppose buying health insurance is a behavior without externality, it follows that we better to let free market to decide its price. Do you agree or disagree the above statement. (Analyze it with appropriate models.) (16%)

IV. (20%) Suppose, in a poll of 910 adults, 503 respondents reported that they were optimistic about the national outlook. The Press Secretary claims that this poll indicates that the majority of adults are optimistic about the nation's outlook. Conduct a hypothesis test using the p-value approach and use α = 0.05 for the level of significance to test the Press Secretary's statement.

6. Suppose buying health insurance is a behavior without externality, it follows that we better to let free market to decide its price. Do you agree or disagree the above statement. (Analyze it with appropriate models.) (16%)

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