In a poll to estimate presidential popularity, each person in a random sample of 1,390 voters was asked to agree with one of the following statements:
The president is doing a good job.
The president is doing a poor job.
I have no opinion.
A total of 500 respondents selected the first statement, indicating they thought the president was doing a good job.
a) Construct a 99% confidence interval for the proportion of respondents who feel the president is doing a good job. (Round your answers to 3 decimal places.)
Confidence interval for the proportion is________ up to_____________
Given information:
Total number of random Sample (n) = 1390
Favorable outcome = 500
Now, the sample proportion (p) is calculated as follows:
Confidence level=99%
So,
Significance level=1- Confidence level
=1-99%
&nb...
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