Answer:
they allow researchers to know how closely the sample resembles the target population. ... As such, researchers know the percentages of the population based on race, gender, age, education, and a whole host of other demographic characteristics.
??? uhh i think the answer is 200?
Answer:
I need more explanation or background about the topic
Explanation:
Answer:
you can find the best information on websites like the NHS or your national health or CDC
