Question

In: Statistics and Probability

A telephone service representative believes that the proportion of customers completely satisfied with their local telephone...

A telephone service representative believes that the proportion of customers completely satisfied with their local telephone service is different between the Midwest and the South. The representative's belief is based on the results of a survey. The survey included a random sample of 1120 midwestern residents and 1260 southern residents. 37% of the midwestern residents and 49% of the southern residents reported that they were completely satisfied with their local telephone service. Find the 80%

confidence interval for the difference in two proportions.

Step 1 of 3 :

Find the point estimate that should be used in constructing the confidence interval.

Step 2 of 3: Find the margin of error. Round your answer to six decimal places. Step 3 of 3: Construct the 80% confidence interval. Round your answers to three decimal places.

Solutions

Expert Solution

Margin of error = 0.025846


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