Identify the specific type of sampling used for each situation. 1. A statistics professor is interested in selecting a sample of 200 students. He selects 40 men and 160 women from 100 men and 400 women respectively. 2. In conducting research for a economics course, a student of Harvard interviews students who are leaving the grocery store. 3. A reporter obtains numbered listing of 1000 companies with the highest stock market values, uses a computer to generate 20 random samples between 1 and 1000, and then interviews the chief executive officers of the companies corresponding to these numbers. 4. A PhD Economics student interviews all nurses in each of 5 randomly selected hospitals in the region. 5. Ms. Morales wants to give away 3 movie tickets. In order to avoid bias, she wrote the name of each of her students in a paper and placed it in a hat. To determine the 3 winners, she picked 3 rolled papers from the hat. 6. A student interviews school principals and classroom teachers about the implementation of K12. 7. As part of a research to know how many students want to pursue a career in economics. The population of interest is splitted into two strata based on gender so that there are 4,000 male students and 6,000 female students. The researcher then selects 800 male students and 1,200 female students for the sample population.
Identify the specific type of sampling used for each situation.
1. A statistics professor is interested in selecting a sample of 200 students. He selects 40
men and 160 women from 100 men and 400 women respectively.
2. In conducting research for a economics course, a student of Harvard interviews students
who are leaving the grocery store.
3. A reporter obtains numbered listing of 1000 companies with the highest stock market
values, uses a computer to generate 20 random samples between 1 and 1000, and then
interviews the chief executive officers of the companies corresponding to these
numbers.
4. A PhD Economics student interviews all nurses in each of 5 randomly selected hospitals
in the region.
5. Ms. Morales wants to give away 3 movie tickets. In order to avoid bias, she wrote the
name of each of her students in a paper and placed it in a hat. To determine the 3
winners, she picked 3 rolled papers from the hat.
6. A student interviews school principals and classroom teachers about the
implementation of K12.
7. As part of a research to know how many students want to pursue a career in economics.
The population of interest is splitted into two strata based on gender so that there are
4,000 male students and 6,000 female students. The researcher then selects 800 male
students and 1,200 female students for the sample population.
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