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In: Statistics and Probability

5. A question in the poll of 1,000 adult Americans was “How much are you worried...

5. A question in the poll of 1,000 adult Americans was “How much are you worried about the quality of education in our schools?” 63% responded “a lot”. We are interested in the population proportion of adult Americans who are worried a lot about the quality of education in our schools.

a.Test if normal model applies in this condition.

b. Find the standard error.

c.Construct the 90% confidence interval and interpret the meaning of it.

d. Construct the 95% confidence interval and interpret the meaning of it.

Solutions

Expert Solution

( c )

we are 90% confident that the true population proportion of adult Americans who are worried a lot about the quality of education in our schools lies between 0.605 and 0.655

( d )

we are 95% confident that the true population proportion of adult Americans who are worried a lot about the quality of education in our schools lies between 0.600 and 0.660

orchestra answered 2 years ago
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