Mathematics
Grade 12
45 min
Interpret confidence intervals for population means
Tutorial Preview
1
A confidence interval for daily website visitors is (40, 50). Find the sample mean.
2
A study has a 90% confidence level. What does this mean?
3
An interval for average phone battery life is (8, 10) hours. Is 7 hours a plausible value?
Sample Practice Questions
Easy
A 95% confidence interval for the weight of a product is (100, 120) grams. What is the sample mean?
0.100
1.110
2.120
3.10
Easy
A confidence interval for test scores is (80, 90). What is the margin of error?
0.5
1.10
2.85
3.90
Easy
A researcher states they are '99% confident'. What does the 99% refer to?
0.The sample
1.The method
2.The mean
3.The data
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing FreeMore from Statistics
Mathematics for other grades
Frequently asked questions
What grade level is "Interpret confidence intervals for population means"?
Interpret confidence intervals for population means is a Grade 12 Mathematics lesson on ExcelOS.
Is "Interpret confidence intervals for population means" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Interpret confidence intervals for population means?
This lesson includes 21 practice questions across multiple difficulty levels, each with instant feedback and explanations.