Question

Given the following information: n = 200 | x = 155 Determine the 80% confidence interval...

Given the following information:

n = 200 | x = 155

Determine the 80% confidence interval estimate for the population proportion.

Math   Statistics-And-Probability   
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Answer #1

We have given,          
          
x=155      
n=200      
Estimate for sample proportion=0.775
Z critical value(using Z table)=1.28  
Confidence interval formula is

=(0.7372,0.8128)


Lower limit for confidence interval=0.7372
          
Upper limit for confidence interval=0.8128

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