Notes

• Population vs Sample
• Populations are hard to define and hard to observe in real life.
• Sample is easier to get. Less time consuming and less costly (cheaper).
• Population is hard to observe, and hard to contact. Sample is easy to observe, and easy to contact.
• Most of the time, sample data.
• Sample has two defining characteristics.
  • Randomness
    • A random sample is collected when each member of the sample is chosen from the population strictly by chance.
  • Representative
    • A representative sample is a subset of the population that accurately reflects the members of the entire population.

Course Materials

course_notes_descriptive_statistics.pdf

Glossary.xlsx