Key Takeaways
Lesson Description
Key Takeaways
• Sample statistics vary from sample to sample.
• Sampling distributions describe this variability.
• The Central Limit Theorem explains why sampling distributions become approximately normal.
• Larger sample sizes reduce variability.
• Standard error measures sampling variability.
Must Know Equations
Mean of Sampling Distribution:
μx̄ = μ
Standard Error:
σx̄ = σ/√n
Must Know Vocabulary
Sampling Distribution
Central Limit Theorem
Standard Error
Sampling Variability
Statistic
Parameter
AP Exam Focus
• Explain sampling distributions.
• Apply the Central Limit Theorem.
• Calculate standard error.