What is a confidence ...

[saraeharris]

What is a confidence coefficient?

Question 2

What is a confidence interval?

[jamesnevil303]

Answer to Question 1

For a confidence interval, the proportion of such intervals that would include the population parameter if the process leading to the interval were repeated a great many times.

Answer to Question 2

A confidence interval is an interval estimate for which there is a specified degree of certainty that the actual value of the population parameter will fall within the interval.