HW1

1.1

• 1. The logic of uncertainty
• 3. Individual
• 5. Statistic
• 7. Parameter
• 9. Statistic
• 11. Parameter
• 13. Statistic
• 15. Qualitative
• 17. Quantitative
• 19. Quantitative
• 21. Qualitative
• 23. Discrete
• 25. Continuous
• 27. Continuous
• 29. Discrete
• 39. Population: teenagers Sample: 1028 teenagers 13 to 17 years old and live in the US
• 40. Population: Coke bottles Sample: coke bottles filled on Oct 15
• 41. Population: Soybeans Sample: 100 plants
• 42. Population: Americans Sample: 50,000 households

1.2

• 13. Observational
• 14. Experiment
• 15. Experiment
• 16. Observational
• 17. 1. Cohort Study - Collecting data overtime
  2. Response: heart disease Explanatory: happiness
  3. This sentence is saying that there is a confounding variable (genetics) that is causing the inhability to seperate the two variables
• 18. 1. Cross sectional - current data from a cross section of a population is being researched
  2. Response: skin cancer Explanatory: Coffee drinking habit
  3. It is important to adjust these variable because there are different levels of both coffee intake that affect the results