Question

sample response: divide the us into groups, by state. for cluster sampling, randomly choose twenty states and use the population of those states as the sample. for stratified sampling, randomly choose 10,000 people from every state as the sample. did you include the following in your response?
☐ for both methods, divide a population into groups.
☐ for cluster sampling, select all of the members in some of the groups.
☐ for stratified sampling, select a random sample from each group.
done ✔️

Explanation:

1. For the first option: The sample response divides the US (population) into groups by state, so this is included.
2. For the second option: In cluster sampling, the sample response randomly chooses twenty states (groups) and uses all the population of those states (all members in some groups), so this is included.
3. For the third option: In stratified sampling, the sample response randomly chooses 10,000 people from every state (a random sample from each group), so this is included.

Answer:

• $\boldsymbol{\square}$ For both methods, divide a population into groups. (Should be checked as the sample divides the US population into state groups)
• $\boldsymbol{\square}$ For cluster sampling, select all of the members in some of the groups. (Should be checked as 20 states' populations (all members of those groups) are used)
• $\boldsymbol{\square}$ For stratified sampling, select a random sample from each group. (Should be checked as 10,000 people are randomly chosen from each state (group))