Cathy conducted a survey on the relationship between substance abuse and average annual income of an individual. She divided the annual incomes into three ranges, labelled them as low income, middle income, and high income, and found the groups to be present in the target population in the ratio of 4:5:1 . Cathy needed a sample of 100 participants. She selected 40, 50, and 10 people from each income group in a manner such that each individual in a subgroup had equal chance of getting selected into the respective subsample. Which of the following sampling techniques has Cathy used in this scenario?
a. Stratified random sampling
b. Convenience sampling
c. Cluster sampling
d. Quota sampling
Question 2
Which of the following statements is TRUE, when viewing the family as a system?
a. One single person in the family orchestrates the interactional patterns
b. All behavior makes sense in context
c. One single person can be blamed for family distress
d. Personal characteristic are independent of the system
Worldwide Variations in Population and Income Levels Developed countries represent only 18% of the
The annual pattern of rings changes with ocean temperature and coral health
A close relationship between greenhouse gas emissions and a country’s gross domestic product
Income per Capita versus Inequality
Average real hourly wages (2010 dollars) by education level, full-time workers aged 17 to 34 in 2011
The temperature of an average lightning bolt is 3.0 x 104 °C. What is the equiva