Question
Which type of study should involve random selection?
Select three correct answers.
Click Here for a Hint
(2 points)
Responses
census
census
survey
survey
observational study
observational study
experimental study
experimental study
convenience sample
Select three correct answers.
Click Here for a Hint
(2 points)
Responses
census
census
survey
survey
observational study
observational study
experimental study
experimental study
convenience sample
Answers
GPT-4o mini
The types of studies that should involve random selection are:
1. **Census** - A census aims to collect data from the entire population and should ideally use random selection to ensure that every individual has an equal chance of being included, leading to unbiased results.
2. **Survey** - Surveys usually involve sampling from a larger population, and random selection helps to ensure that the sample is representative of the population, minimizing bias.
3. **Experimental Study** - In experimental studies, random selection is often used to assign subjects to different groups (e.g., treatment vs. control) to ensure that any differences observed can be attributed to the experimental manipulation rather than pre-existing differences.
**Observational study** may sometimes involve random selection but is not strictly required as the study observes subjects in their natural environment without intervention. **Convenience sample** does not involve random selection as it's based on readily available subjects, which can lead to bias.
Therefore, the correct responses are:
- census
- survey
- experimental study
1. **Census** - A census aims to collect data from the entire population and should ideally use random selection to ensure that every individual has an equal chance of being included, leading to unbiased results.
2. **Survey** - Surveys usually involve sampling from a larger population, and random selection helps to ensure that the sample is representative of the population, minimizing bias.
3. **Experimental Study** - In experimental studies, random selection is often used to assign subjects to different groups (e.g., treatment vs. control) to ensure that any differences observed can be attributed to the experimental manipulation rather than pre-existing differences.
**Observational study** may sometimes involve random selection but is not strictly required as the study observes subjects in their natural environment without intervention. **Convenience sample** does not involve random selection as it's based on readily available subjects, which can lead to bias.
Therefore, the correct responses are:
- census
- survey
- experimental study