Question

A survey asked 40 people if they were concerned about the environment - 6 said that they were very concerned. Which of the following statements correctly describes how the confidence interval for the population proportion of people that are very concerned about the environment should be computed?

Answer 1

There are not 15 failures and 15 successes. A confidence interval can be computed by adding 2 failures and 2 successes .

Explanation:

Given that

Survey asked by 40 people

6 said that they were very concerned.

So the following statements correctly describe the above problem

The correct statement is , There are not 15 failures and 15 successes. A confidence interval can be computed by adding 2 failures and 2 successes .