A poll asked for people's opinion on whether closing local newspapers would hurt civic life; 426 of 1005 respondents said it would hurt civic life a lot. Complete parts a through d below.

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A poll asked for people’s opinion on whether closing local newspapers would hurt civic life;
426 of 1005 respondents said it would hurt civic life a lot.
Complete parts a through d below.
a. Find the proportion of the respondents who said that closing local papers would hurt civic life
a lot.
(Round to three decimal places as needed.)
b. Find a 95% confidence interval for the population proportion who believed closing
newspapers would hurt civic life a lot. Assume the poll used a simple random sample (SRS). (In
fact, it used random sampling, but a more complex method than SRS.)
(Round to three decimal places as needed.)
( ; ) c. Find an 80% confidence interval for the population proportion who believed closing
newspapers would hurt civic life a lot.
(Round to three decimal places as needed.)
( ; ) d. Which interval is wider and why?
1. The 80% interval is wider. To get a higher degree of certainty, the interval needs to be
widened.
2. The 95% interval is wider. To get a higher degree of certainty, the interval needs to be
widened just on the right side.
3. The 95% interval is wider. To get a higher degree of certainty, the interval needs to be
widened just on the left side.
4. The 95% interval is wider. To get a higher degree of certainty, the interval needs to be
widened.

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