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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define sample size in your own words.
💡 Hint: Think about how many surveys are conducted.
Question 2
Easy
What does a confidence interval indicate?
💡 Hint: It's about the certainty of an estimate.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does a larger sample size typically lead to?
- Higher accuracy
- Lower accuracy
- No change in accuracy
💡 Hint: Think about the relationship between sample size and conclusions.
Question 2
True or False: A confidence interval is a guarantee of where a population parameter will fall.
- True
- False
💡 Hint: Consider what confidence intervals indicate.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A political survey team wants to estimate support for a policy with 90% confidence. If they find that 30% support it from a sample of 200 people, how do they calculate the margin of error?
💡 Hint: Use the formula: MOE = z * sqrt(p(1-p)/n).
Question 2
You have a data set of 50 voters, and the average age is 35 years with a standard deviation of 5 years. Calculate a 95% confidence interval for the average age of voters.
💡 Hint: Use the formula: CI = mean ± (z * standard error), where z for 95% is approximately 1.96.
Challenge and get performance evaluation