Question

In a survey of 1000 people, 700 people said that they voted in the last presidential election. Let p denote the proportion of all people who voted. Which of the following actions would result in a confidence interval narrower than the 95% confidence interval computed from this sample?

Answer 1

• Answer:

Therefore, Option (A): Increase the Sample Size. This will result in a Narrower Confidence Interval for the Proportion (p) of all people who voted.

• Explanation:

Make a plan:

To Narrow the confidence interval, We can either increase the sample size or decrease the confidence level

• Solve the problem:

List the options:

A) - Increase the Sample Size

B) - Decrease the Confidence Level

• Draw the conclusion:

Choose the Appropriate Action:

Option (A): Increase the Sample Size. This will result in a Narrower Confidence Interval for the Proportion (p) of all people who voted.

I hope this helps!

Answer 2

See below

Explanation:

To make the confidence interval narrower, you would need a smaller confidence level, like 90% for example. You don't list any options, but hopefully this is closest to what you'd be looking for.