Social stratification is dividing people by class.
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Disadvantaged populations in the United States that saw increases in life expectancy from 1961-1983 continued to experience increased life expectancy in later decades is a "false" statement as it life expectancy became much worse.
<h3>What is life expectancy?</h3>
life expectancy is an estimate of how long, on average, a person of a certain age may expect to live. The average life expectancy is the most often used indicator of life expectancy.
Some characteristic of life expectancy are-
- Life expectancy is an illustrative metric.
- It is predicated that people born during the year question will die at the age-specific mortality rates for the duration of their lives.
- The estimate, in essence, extrapolates the years mortality (death rates) for something like a specified time period over the lifetime of such population born (or living) at that time.
- The measure varies significantly depending on gender, race, and locality.
- Therefore, rather than for the entire population, life expectancy is frequently reported for specific categories.
- For instance, white women in in United States who have been born in 2003 can expect to live to the age of 80.4.
To know more about life expectancy, here
brainly.com/question/7184917
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The complete question is-
Disadvantaged populations in the United States that saw increases in life expectancy from 1961-1983 continued to experience increased life expectancy in later decades. (True/False)
Answer: c) participant observation.
Explanation:
Participant observation is the qualitative research mechanism through which researchers get involved in the research activity along with the participants for studying and observing.It gives comprehensive understanding to researcher.It is usually carried out in field of sociology and anthropology.
According to the question,John is using participant observation as he is becoming a part of research along with homeless people to keenly observe the process and collect data on basis of that.
Other options are incorrect because secondary data analyzation, comparative research and qualitative technique are not used by investigator to become a part of research along with participants.Thus,the correct option is option(c).
