Question

In​ 2003, an organization surveyed 1,500 adult Americans and asked about a certain​ war, "Do you...

In​ 2003, an organization surveyed 1,500 adult Americans and asked about a certain​ war, "Do you believe the United States made the right or wrong decision to use military​ force?" Of the 1,500 adult Americans​ surveyed,1,086 stated the United States made the right decision. In​ 2008, the organization asked the same question of 1,500 adult Americans and found that 575 believed the United States made the right decision. Construct and interpret a​ 90% confidence interval for the difference between the two population​ proportions, p2003−p2008.

the upper bound is ?

the lower bound is ?

Math   Statistics-And-Probability   
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Answer #1

The statistical software output for this problem is:

From above output, 90% confidence interval rounded off to 4 decimal places is:

Upper bound = 0.3687

Lower bound = 0.3126

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