Video Lecture 2
Example: Using New Vocabulary
Powercell Batteries wants to estimate the average
lifetime (in hours) of the Series X battery they produce.
The lifetimes of 200 Series X batteries are measured.
• Available or Newly Produced Data?
• Type of Study? Observational or Experiment?
• Cross-Sectional or Time Series?
• Variable?
• Numerical or Categorical?
• Population? (What group do we want to generalize about?)
Powercell Batteries wants to estimate the average
lifetime (in hours) of the Series X battery they produce.
The lifetimes of 200 Series X batteries are measured.
• Census or Sample?
• Elements?
• Measurement Scale?
• Parameter? (What measure do we want to understand?)
• Statistic? (What can we calculate from the data to estimate the parameter?)
• Conclusion? (What generalizations could be made?)