HW1

1.1

• 1. Statistics is the science of collecting,organizing, analyzing, and summarizing and analyzing info to draw conclusions or answer questions
• 3. Individual is a person or object that is a member of the population being studied
• 5. A statistic is a numerical summary of a sample. A parameter is a numerical summary of a population
• 7. Statistic
• 9. Statistic
• 11. Statistic
• 13. Statistic
• 15. Qualitative
• 17. Quantitative
• 19. Quantitative
• 21. Qualitative
• 23. Discrete
• 25. Continuous
• 27. Continuous
• 29. Discrete
• 39. Population: teens in the US, sample: 1028 teenagers between the age of 13-17
• 40. Population: Coca Cola Bottles, sample: 50 bottles filled on October 15th
• 41. Population: soybean crop, sample: 100 specific plants from the crop
• 42. Population: Households in the US, sample: 50,000 surveyed households

1.2

• 13. observational study
• 14. observational study
• 15. designed experiment
• 16. observational study
• 17. a)cohort study as the experiment looks at people over a ten year period to define the value of the response variable b) happiness is the explanatory variable and heart disease is the response variable c) this sentence is saying that genetics is a potential counfounding variable
• 18. 1. cross sectional study because this experiment is examining the association between two factors, nonmelanoma and coffee over a short period of time b)coffee is the explanatory variable, nonmelanoma is the response variable c) some people in different parts of the US have a better natural resistance to the sun so coffee will not make a hug difference in bettering the condition of their skin