4. Statistics and Probability
Confidence Intervals — Quiz
Test your understanding of confidence intervals with 5 practice questions.
Practice Questions
Question 1
Which statement best describes a confidence interval?
Question 2
What is the correct interpretation of a $95\%$ confidence level?
Question 3
If the sample size increases while the confidence level and variability stay the same, what usually happens to the width of the confidence interval?
Question 4
If the confidence level increases from $95\%$ to $99\%$ while the sample data stay the same, what usually happens to the confidence interval?
Question 5
A sample mean is $50$ and the margin of error is $3$. What is the confidence interval?