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 West. The representative's belief is based on the results of a survey. The survey included a random sample of 760 midwestern residents and 680 western residents. 37% of the midwestern residents and 46% of the western residents reported that they were completely satisfied with their local telephone service. Find the 90% 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 90% confidence interval. Round your answers to three decimal places.
Solutions
orchestra answered 1 year agoRelated Solutions
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...
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 West. The
representative's belief is based on the results of a survey. The
survey included a random sample of 760 midwestern residents and 680
western residents. 37% of the midwestern residents and 46% of the
western residents reported that they were completely satisfied with
their local telephone service. Find the 90% confidence interval for
the difference...
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 West and the Northeast. The
representative's belief is based on the results of a survey. The
survey included a random sample of 12401240 western residents and
13001300 northeastern residents. 46%46% of the western residents
and 35%35% of the northeastern residents reported that they were
completely satisfied with their local telephone service. Find the
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An automobile manufacturer would like to know what proportion of its customers are not satisfied with...
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its customers are not satisfied with the service provided by the
local dealer. The customer relations department will survey a
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