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For the previous problem a breakdown of the genders of the sample of voters is: male...

For the previous problem a breakdown of the genders of the sample of voters is:

male female
for 300 450

against 310 420

a. What is the point estimate for the difference of the two populations proportions for?

b. Construct a 90% Confidence Interval for the proportion difference.   

Math   Statistics-And-Probability   
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