Question

Using data from a random sample of 436 Springfield residents, a criminologist found that 63 percent...

Using data from a random sample of 436 Springfield residents, a criminologist found that 63 percent of them oppose funding cuts for the city police department.

  1. Calculate a 95% confidence interval.
  2. Calculate the 99% confidence interval
Math   Statistics-And-Probability   
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Answer #1

Given : n=436 , p=63%=0.63

a. Now , ; From standard normal distribution table

Therefore , the 95% confidence interval is ,

b.

Now , ; From standard normal distribution table

Therefore , the 959% confidence interval is ,

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